Merge pull request #53 from doowb/master

Adding ext option.
Merge pull request #55 from doowb/master

Adding grunt-version to build
updated README, package.json and .gitignore
adds options.md to docs.
Merge remote-tracking branch 'refs/remotes/origin/master'

Conflicts:
	package.json
Merge remote-tracking branch 'refs/remotes/origin/master'
Merge pull request #56 from doowb/master

Grid example
additional documentation on options
Merge remote-tracking branch 'refs/remotes/origin/master'
Merge remote-tracking branch 'refs/remotes/origin/master'

updated docs for options
updated package.json with assemble as author
adds README.md to examples/grid, removed a non-assemble option from root readme
updated options docs
updated example CSS
updated Gruntfile comments
block formatting
updated version and description in package.json
updated readme with template examples, options docs
made format more consisten in helpers.md.
moved getting started stuff closer to the top of readme.md