Merge commit '1daaf03bb5a440e6575eae693bf0d3455f5c437d' into courier_merge
Merge branch 'courier' into courier_merge

Conflicts:
	app/src/info/guardianproject/securereaderinterface/ui/ActionProviderFeedFilter.java
	external/CacheWord
Fixes after merge.
Merge pull request #52 from N-Pex/courier_merge

Merging everything from courier back into master.
move Jenkins build process to its own script

This includes adding the date/time to the versionName and setting the
versionCode to the current UNIX time in seconds.  This makes it easy to
distiguish test builds from each other.
script for running the release build process
include `git submodule sync` in jenkins-build

Jenkins seems to break out when the URL for the submodule changes.  So to
help it along, run `git submodule sync` as part of the build process.