Refactor project to monorepo

...and refactor the project as a whole.

* remark(1) is now `remark-cli`;
* remark(3) is now `remark`, but is split into
  `remark-parse` and `remark-stringify`.

Major changes
-------------

There’s a lot less duplicate documentation between the
different projects.  Although this does require more
navigation between links, this should make things clearer
for newcomers who don’t know what’s what.

* Externalise remark(1) into `unified-engine` (API) and
  `unified-args` (CLI creator), which comes with a huge
  refactor, 100% coverage, and lots of bug fixes.

* Update to use [email protected], which comes with a much
  simpler interface, includes a streaming interface,
  better support for combining processors, and allows
  transformers to provide a new syntax tree instead of
  only allowing modifications.

  The most notable change is that `remark.process()` and
  the like no longer work, switch instead to using
  `remark().process()`.

  Read more: <https://github.com/wooorm/unified/releases/tag/4.0.0>

* The parser and compiler are now their own packages,
  which, combined with [email protected] means browsers can
  pack less weight if either isn’t required.  Additionally,
  docs for interacting with the parser and the compiler are
  included.  Those docs result in more of the previously
  private interface to be publicised, which resulted in
  some changes for the better:

  * `tokenizer.onlyAtTop` > `tokenizer.notInList`;
  * `Processor#atTop` > `Processor#inList`;
  * `Processor#exitTop` > `Processor#enterList`;
  * `tokenizer.notInBlockquote` > `tokenizer.notInBlock`;
  * `Processor#inBlockquote` > `Processor#inBlock`;
  * `Processor#enterBlockquote` > `Processor#enterBlock`;
  * `blockTokenizers.heading` > `blockTokenizers.atxHeading`;
  * `blockTokenizers.lineHeading` > `blockTokenizers.setextHeading`;
  * `blockTokenizers.code` > `blockTokenizers.indentedCode`;
  * `blockTokenizers.fences` > `blockTokenizers.fencedCode`;
  * `blockTokenizers.footnoteDefinition` > `blockTokenizers.footnote`;
  * `inlineTokenizers.inlineText` > `inlineTokenizers.text`;
  * `inlineTokenizers.tag` > `inlineTokenizers.html`;
  * `inlineTokenizers.inlineCode` > `inlineTokenizers.code`.

Minor changes
-------------

* Rewrite tests, using tape instead of mocha, and execa for
  CLI tests.
* Remove man pages.
* Update docs.
* Add Node@^6.0.0 to Travis targets.
* Refactor code style.
* Fix bug in positional information when using BOMs.
* Lower-case `Remark` > `remark` in logo.

.eslintignore

@@ -1,6 +1,5 @@
-build/
-coverage/
-build.js
+**/coverage
+**/node_modules
+packages/remark/cli.js
 remark.js
 remark.min.js
-example.js

.gitignore

@@ -1,8 +1,7 @@
 .DS_Store
+.nyc_output
 *.log
-build/
-node_modules/
-coverage/
-build.js
+node_modules
+coverage
 remark.js
 remark.min.js

.jscs.json

@@ -1,9 +1,8 @@
 {
   "excludeFiles": [
-    "build/",
-    "coverage/",
-    "node_modules/",
-    "build.js",
+    "**/coverage",
+    "**/node_modules",
+    "packages/remark/cli.js",
     "remark.js",
     "remark.min.js"
   ],
@@ -15,7 +14,8 @@
     "value": 79,
     "allExcept": [
       "regex",
-      "urlComments"
+      "urlComments",
+      "require"
     ]
   },
   "requireQuotedKeysInObjects": true,

.remarkrc.js

@@ -8,18 +8,22 @@
 module.exports = {
     'output': true,
     'plugins': {
-        /* Custom natural-language validation. */
-        'script/natural-language': null,
-        'comment-config': null,
-        'lint': {
-            /* Ignore `final-definition` for `license` */
-            'final-definition': false
+        // 'comment-config': null,
+        // 'github': null,
+        // 'validate-links': null,
+        'toc': {
+            'maxDepth': 3,
+            'tight': true
         },
-        'github': null,
-        'usage': null,
-        'toc': null,
-        'license': null,
-        'validate-links': null
+        'lint': {
+            /* `h6` for signatures. */
+            'no-duplicate-headings': false,
+            'heading-increment': false,
+
+            /* Lists. */
+            'list-item-spacing': false,
+            'no-missing-blank-lines': false
+        }
     },
     'settings': {
         /* I personally like asterisks. */

.travis.yml

@@ -1,21 +1,15 @@
 language: node_js
 script: npm run-script test-travis
 node_js:
-- '0.10'
 - '0.11'
 - '0.12'
 - '4.0'
 - '5.0'
-after_script: npm install codecov.io && cat ./coverage/lcov.info | codecov
+- '6.0'
+after_success:
+- bash <(curl -s https://codecov.io/bash)
 sudo: false
 deploy:
-  - provider: npm
-    email: [email protected]
-    api_key:
-      secure: h4ADxR4z3G3m7hweVZlq64ytgENE4UPUesnpiQbwcRBcQy79TNcITWJ/61yEnhEHB94FEuP/rMC3KU2Ho7kinyeO/JNoK1YlhVKKBZuIYwsJ4Op3ndwZ71TCPe0wIbWxOfhO9L7t6oytNnPg9gWNqLkQW8rBZ+ujdcdtMQ82XZE=
-    on:
-      tags: true
-      node: '5.0'
   - provider: releases
     api_key:
       secure: GCfTZxoqpp1tMmslM5MTI13BLv+bvFhZUuhX+dQFbcVYODQKUjnUj9EBF10PJSTpYqm3GnGpxEoQ6RAUVxlH7rBQUFm4czaZPPgCDSZT3B8pszmQkl1aRyvdmXFoKfyNhFUwBUSsoBpM92wp/UrgIZ/CI0jLoIZbCwn4KH02rf8=
@@ -24,3 +18,4 @@ deploy:
       - "remark.min.js"
     on:
       tags: true
+      node: '6.0'