Fixing issue #3 - adding timeouts to checkout

The default value for the checkout timeout is set to
5000ms, the default OTP value -- there should be no change in
behaviour between this version and the older ones, although it
is now possible to add a timeout value if needed.
Added License
Fixing build and deps

Building can now be made with the makefile as it should.

Tests include PropEr to run, but regular builds do not include
PropEr as it's not needed for production use.
Fixing configuration typespec

Also bumping to 0.1.2
Merge branch 'master' into r14

Conflicts:
	src/dispcount.app.src