Latest version of 1.x branch

1.5

hhvm added to travis tests

Latest Elfinder files

Updated to latest Elfinder files.

Updated documentation, small fixes

Updated documentation, small fixes

Uglify CSS/JS support

Dropped YUI compression support.
Uglify JS/CSS optional compression.

Bundle now TinyMCE 4 compatible

1. TinyMCE 4 integration
2. Added link to IvoryCKEditorBundle in Readme
3. Minor improvements
4. Readme TOC