Added in paper_trail gem and fixed orphaned process bug

The paper_trail gem will now version all Scene models, which
gives us the ability to go back and extract the entire edit
history for a scene across all saves ever performed.
The delegate_servers script was modified to kill child processes
by sending SIGINT to the rails process group id at exit.
This single signal will take down any and all delegate servers.  Hooray!
Ensure AssetManager calls callback on texture load failure
Add IntelliJ IDEA files to .gitignore
Allow loading of converted SS scenes by loading in transformations and ignoring scene hierarchy
added mechanical turk models
Fix paths to account for hosting on sub-URIs
Disable SSL under production
Check whether under development or test before launching solr reverse proxy
Add public/assets folder to gitignore
Updated README.md with deployment instructions, closes #2
Fix some remaining absolute URI references to account for relative URI deployment
Updated README.md with correct asset precompilation commands
Redirect to scenes when logged in. Rudimentary home and help page content.
Redirect to scenes when logged in. Rudimentary home and help page content.
Merge branch 'master' of https://github.com/phgrads/SceneStudio
Fix solr exec call redirection so that call no longer fails
Change solr fork process so it redirects output to log using ruby, not shell redirections.
Merge branch 'master' of https://github.com/phgrads/SceneStudio

Conflicts:
	config/initializers/delegate_servers.rb
Tweaks to solr process handling to allow running under Windows
Merge branch 'master' of github.com:phgrads/SceneStudio

Conflicts:
	config/initializers/delegate_servers.rb