adding a command-line utility for executing common testing functions
missing delete function on config.
new katest management command "clean_db"
preventing central-server regret
refactor confirm logic in katest clean_db
Merge remote-tracking branch 'gimick/katest_tool' into katest_tool

Conflicts:
	kalite/management/commands/katest.py
Don't allow people to be invited to headless zones, nor to create any.
Merge branch 'software-keyboard' of git://github.com/jamalex/ka-lite into software-keyboard

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Signed-off-by: wangguan59 <wangguan59@gmail.com>
Windows script will now pull the production port.
Fixed the top navigation bar hover problem. Clean up some code in Khan-site and moved to Khan-lite, and group nav css together.
Moved JS from exercise.html/video.html
Removed delimiter.
update
update in video.html
Modify the code format, and make install link open in external window
Make hover effect globally, which allow both nav items and links have hover effects.
Merge pull request #273 from bcipolli/katest_tool

adding a command-line utility for executing common testing functions

This is test-only code that has been tested and reviewed.  No reason not to merge.
Merge pull request #319 from bcipolli/headless_zones_sandboxed

Sandboxing admin of "headless zones" dummy organization
This passed code review and we've got our model for release branching; merging into develop now.
Merge pull request #410 from wangguan59/nav_hover

Nav item hover
Merge pull request #407 from wangguan59/external_link

Open external link in new window