setup circleci and build util scripts

.circleci/config.yml

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+# Golang CircleCI 2.0 configuration file
+#
+# Check https://circleci.com/docs/2.0/language-go/ for more details
+version: 2
+jobs:
+  build:
+    docker:
+      - image: circleci/golang:latest
+    working_directory: /go/src/github.com/xchapter7x/clarity
+    steps:
+      - checkout
+      - setup_remote_docker:
+          docker_layer_caching: true
+      - run: go get -u github.com/maxbrunsfeld/counterfeiter
+      - run: dep ensure
+      - run: make unit
+      - run: make build
+      - persist_to_workspace:
+          root: bin
+          paths:
+            - create_new_release.sh
+      - persist_to_workspace:
+          root: build
+          paths:
+            - clarity.exe
+            - clarity_osx
+            - clarity_unix
+  release:
+    docker:
+      - image: socialengine/github-release
+    working_directory: /go/src/github.com/xchapter7x/clarity
+    steps:
+      - attach_workspace:
+          at: bin
+      - attach_workspace:
+          at: build
+      - run: ./bin/create_new_release.sh
+workflows:
+  version: 2
+  build-and-release:
+    jobs:
+      - build
+      - release:
+          requires:
+            - build

bin/create_new_release.sh

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+#!/bin/bash -x
+echo "generate a rc build number"
+github-release info | grep -A 20 "^git\ tags"
+next_semver=`github-release info | grep -A 20 "^git\ tags" | grep "^-" | grep -v -e "-rc" | head -1 | awk '{print $2}' | awk -F"." '{print $1"."$2"."$3+1}'`
+next_rc_version=`github-release info | grep -A 20 "^git\ tags" | grep "${next_semver}" | grep -e "-rc" | head -1 | awk -F"-rc." '{print $2+1}'`
+if [[ "${next_rc_version/ /}" == "" ]]; then
+  echo "setting default base rc"
+  next_rc_version=0
+fi
+echo "next rc id is: "$next_rc_version
+echo "generate a release tag for this RC"
+tag=${next_semver}-rc.${next_rc_version}
+echo "tag id is: "$tag
+echo "creating release"
+github-release release -t ${tag} -p
+echo "uploading files"
+for file in `ls build | grep '^clarity'`
+do
+  github-release upload -t ${tag} -f build/${file} -n ${file}
+done