Merge branch 'release/0.2.3'
Travis-CI: Only test master and stable branches
Documentation/log: Double blank lines between days
Design/ProgressReview: Use comparison screenshots

This replaces the design mockup and implementation screenshots with side
by side comparison images of both.
models/search: Minor alignment fix
Documentation/Log: Add notes for Tuesday 31st
Documentation/Log: Add notes for Monday 20th
Documentation/Log: Add notes for Tuesday
Documentation/Log: Add notes for Wednesday
project.clj: Fix project description
project.clj: Correct project version
tools/mkrelease: Re-indent for 4 spaces not tabs
tools/mkrelease: Set version in project.clj
Bump release version for '0.2.4'
tools/mkrelease: Don't forget to commit project.clj
Merge branch 'release/0.2.4' into stable

Conflicts:
	Documentation/Log.md