Adding check for a valid encryption context to MailerFactory.
Fixing support for SMTP encryption.

Closes #614
Closes #619
Update README.md
Update README.md
Updating the PHP Code Sniffer UI plugin to fix the line number link.
Merge branch 'master' of github.com:Block8/PHPCI
Added Gulp JS plugin.

Closes #606
Adding a branch filter to the project page, allowing users to view builds from a specific branch.

Closes #600
Add new variable %BRANCH% to interpolator.

Closes #597
Fixed webhook method docs.

Closes #565