withSort does not sort properly

I could not get withSort working, so I fixed it.

returning the value of comparison is not a proper way to do sorting. Instead one should return one of these values: ```-1```, ```1``` or ```0``` based on sorting order.

Note: this bug has also been fixed in assemble/handlebars-helpers#29 but I fixed it here too in case this might be accepted quicker
Added sorting support into coffeeScript of withSort too

Here's the coffeeScript version with fixed sorting..
Merge pull request #34 from Arkkimaagi/patch-3

withSort does not sort properly
fix inArray helper bug. renamed each_with_classes and foreach to be camel case
update repo name in tests
fix inArray helper
remove tasks and junk from Gruntfile that is no longer needed since we moved examples to another repo
Merge branch 'master' of https://github.com/assemble/handlebars-helpers
removing the "content" helpers and moving them to another lib.
removed eachProperty helper, since this can be accomplished with native handlebars helpers
fixed test for {{now}} helper
update coffescript version, rebuild and run tests
0.2.7
Merge remote-tracking branch 'refs/remotes/origin/master'
merged in changes from Mikko
adds .npmignore to exclude docs and src files from being installed with npm
remove HTML helpers
remove readme helpers
remove HTML helpers
remove file helpers