Merge pull request #59 from Soostone/master

Compiled splice updates to df-heist
Bump heist dependency
Add a Disabled constructor to allow programmatic disabling of forms
Merge remote-tracking branch 'mightybyte/master' into disabled

Conflicts:
	digestive-functors-heist/digestive-functors-heist.cabal
Implement Disabled constuctor using Metadata
Modify df-heist to work with the new viewDisabled
Generalize formSplice and make it subsume formSplice' in the process
Accept heist 0.12