test concept to switch output format based on assemble task dest format.
new Utils for switching output to markdown or HTML depending on dest ext, and extracting and transforming repo URL from package.json
tweaked logging tests
removed unused value function from helpers-collections.coffee
refactoring more helpers to have their functions separate from handlebars helper registration
cleaned up HTML helpers
a few more proof-of-concept helpers for examples in assemble-examples-readme.
reverted "block" and "section" helpers to defineSection and renderSection
updated examples/tests, docs and rebuilt
Merge remote-tracking branch 'refs/remotes/origin/master'

Conflicts:
	lib/helpers/helpers-numbers.js
	src/helpers/helpers-numbers.coffee
Merge remote-tracking branch 'refs/remotes/origin/master'
10 new tests, rebuild, publish 0.2.0 to npm