Do not execute a Button Command when disabled
Release 2.9.3
Merge pull request #229 from Livefyre/k_disable_button

K disable button
Modal flow can be stacked. Tests needed.

Conflicts:
	src/modal/main.js
Debugged and tested.

Conflicts:
	src/collection/main.js
	src/content/fetch-content.js
	tests/spec-list.js
	tests/spec/collection/main.js
Remove fetch-content tests because it is not needed atm
Make tests pass
Add tests
Release 2.10.0