Update .travis.yml

Add notification system for Slack.
Merge pull request #61 from brissa-a/master
Finish IncludeCss
Merge pull request #67 from brissa-a/develop

Everything looks ok
Fixing travis.
added haxdlib session
Corrected travis.
Still correcting it.
Listing installed haxelib frim travis.
Testing out some stuff
Add base class for the ticket module.
Minor modification of Ticket module.
fixed template.hxml
Finished correcting template project according to sessions. Travis should compile again properly.
Cleaning.
Finish travis-restoreFinished correcting template project according to sessions. Travis should compile again properly.
Merge pull request #68 from regnarock/master

Travis-ci should now work properly again.
Hotfix deleted trash file.
update module layout to be the same than the reference module.
Work in progress Ticket mod implementation