layout helpers

adding some layout helpers with extend, block, and content
Merge pull request #77 from jonschlinkert/master

adds test coverage for ellipsis, merges in readme updates
Merge branch 'layout-helpers' of http://github.com/doowb/handlebars-helpers
Updating layout helpers

Adding a `mode` to layout helpers to allow prepending, appending
or replacing the blocks of content.
Merge pull request #75 from doowb/layout-helpers

layout helpers
add `dir` "desc" option hash to `withSort` helper
Merge pull request #78 from adjohnson916/master

add `dir` "desc" option hash to `withSort` helper
Merge pull request #79 from jonschlinkert/master

Pulling in Jon's changes
0.3.13
Merge pull request #80 from doowb/master

0.3.13
make uppercase helper should work as an expression or block expression
removes sort-object since it was breaking the build. remove bower.json since the dependencies aren't all registered with bower. rebuild readme