add script for packaging KA Lite into a zip file.  Exclude test stuff, options for locale,platform,and server_type
Setting up apps and variables, such that central server and testing code can be excluded from script.
added comment, remove duplicate addition of central app.
get platform default value from current platform
enable platform-free packaging (keyword: all)
Merge remote-tracking branch 'upstream/develop' into package_kalite
don't need these packages
making small tweaks to the packages included
fixing bug where we elimiated 'test' dirs, which is used by khan and our caching code
don't include XLS files lol
use safer tempfile, interact more easily with call_command, and set execute permissions on .sh files
this is a global kalite command
forgot to remove old command from main directory
Merge remote-tracking branch 'upstream/develop' into package_kalite

Conflicts:
	.gitignore
	kalite/settings.py
	kalite/urls.py
changing command name, cleaning code logic, adding two new options
auto load test OK in debug mode
Code review updates (comment formatting, renaming command, using os.path.join)
Merge pull request #87 from bcipolli/package_kalite

Command for efficient packaging of kalite