Merge pull request #249 from sethkinast/master

Remove debugger in dust-full-1.2.1.js
2-3000% performance enhancement in IE7

Use an array and not a string to store chunks internally. Increases
performance by 2-3000% in IE7. No measurable  changes in performance in
other browsers.
dynamic keys in getBlock fix
fixed join() to join('')
added filters
Removed incorrect fix in unit tests
Merge pull request #253 from jlkonsultab/master

2-3000% performance enhancement in IE7
updated to 1.2.3
add 1.2.2 and 1.2.3 versioned files
remove mustache

since it is Uncaught ReferenceError: Mustache is not defined
Update index.html
update to more intuitive test names
Update coreTests.js
Update coreTests.js