Merge pull request #2503 from raydavis/raywip

CLC-3731 CLC-3668 CLC-3510 Fix duplicated secondary sections
NOJIRA Specify file in more robust way
CLC-3721 Expire more user-specific things
CLC-3726: Video thumbnail is read as "Group"
https://jira.ets.berkeley.edu/jira/browse/CLC-3726

CLC-3727: After video is "played" focus is on window and not on the video
https://jira.ets.berkeley.edu/jira/browse/CLC-3727

CLC-3728: Thumbnail should probably respond to both Enter and Spacebar keys to activate video playback
https://jira.ets.berkeley.edu/jira/browse/CLC-3728
Merge pull request #2504 from ctweney/filePathFix

NOJIRA Specify file in more robust way
Merge pull request #2505 from ctweney/clc-3721

CLC-3721 Expire more user-specific things
Merge pull request #2506 from christianv/CLC-3726

CLC-3726: Video thumbnail is read as "Group"
CLC-3727: After video is "played" focus is on window and not on the video
CLC-3728: Thumbnail should probably respond to both Enter and Spacebar keys to activate video playback
NOJIRA Move "rails" script to Rails 4 directory
According to http://guides.rubyonrails.org/4_0_release_notes.html the app executables belong in "bin" instead of "script".
The command line wrapper falls back to "script/rails" if "bin/rails" is missing, but RubyMine isn't so ingenious.