Fix hubot version for developing to fix spec failure
Clean up after each to avoid mem-leaks

ref: https://travis-ci.org/ngs/hubot-alias/jobs/44082045
Merge pull request #4 from ngs/fix-tests

Fix tests
Fix replacing messages with non-default robot name
Merge pull request #3 from ngs/hubot-name-fix

Fix replacing messages with non-default robot name
Merge branch 'master' of https://github.com/dtaniwaki/hubot-alias into upstream

Conflicts:
	src/scripts/alias.coffee
Fix regexp for alias robot name and @-mention