Stop Relying On gotype For Syntax Errors

[joefitzgerald]

(This is super high priority)

• Periodically run go install . and go test -c -o {tempdir} .
• Ensure both test and non-test files are built for both _test and non-_test packages
• Removegotype as a default linter in gometalinter-linter configuration

See also:

• Incorrect display of errors in the main package #402
• packages named "*_test" not supported by gotype #394
• After update compile time errors are no longer reported #393
• Vendored code not being seen.  gometalinter-linter#32
• Private repo import errors gometalinter-linter#26
• could not import error creeps up gometalinter-linter#24