chore(package.json): replace event-stream with map-stream
test(mocha): make it compatible with mocha test

* npm test will only run mocha
* test/main.js built from src/main.ls
* test/fixtures added
* clean unused gulp task and remove default task
test(mocha): add bare test case
docs(example): add example .ls and gulpfile
chore(package.json): add compiler to description
chore(gulpfile): add npmignore and update gulp release task
Merge branch 'merge_pr_2'
chore(release): 0.0.6