Fixed 500 error with uninitialized helper method

Fixed 500 error with uninitialized helper method
Add delay on keyup and disable browser autocomplete on issue subject field.

Closes #60
Set up integration with Travis

Scripts from https://github.com/alexbevi/redmine_plugins_travis-ci

Closes #51
Merge pull request #65 from abahgat/travis

Travis integration
Fuzzy word matching