v0.5.0

Changes:
* Added support for saving all javascript files de-duplicated and compressed
* Created two configuration dictionaries. One for individual browsers and another for the entire infrastructure
* Support for using OpenWPM as a submodule
* Firefox (v39) and Selenium (v2.47.1)
* Added support for launching Ghostery, HTTPS Everywhere, and AdBlock Plus
* Removed Random Extension Support
* Bugfix for broken profile saving.
* Bugfix for profile clearing when memory limits are exceeded
* Numerous stability fixes
* Full Logging support in all commands

It's important to note that this version fixes several bugs that completely broke profile saving (and profile crash recovery) in v0.4.0. The configuration parameter API has changed to separate individual browser configuration from overall platform configuration.