Add v0.4 migration guide to documentation.
Update migration guide with latest changes
Change wording about unused vars with jshint
Document new banner option
Fixing issue with file.expandFiles where input arrays were not flattened and results were not uniqed.
Switched from node-glob-whatev to @isaacs node-glob. Closes gh-157.

* this allows the "nonull" option to work, which will allow issues gh-182 and gruntjs/grunt-contrib-mincss#1 to be fixed.
Modifing concat task to warn on missing src files/patterns.
Preliminary new gruntplugin init template.
Replace Underscore with Lo-Dash (v0.8.0). Closes gh-172, gh-455.
Updating gruntplugin init template to use the devel 0.4.0a contrib-clean plugin.
Minor gruntplugin init template tweak.
Updating gruntplugin init template readme.
Making a few tweaks to the normalized this.files object.
Updating gruntplugin init template readme.
Updating URLs to reflect move to @gruntjs org and http://gruntjs.com/
Adding CONTRIBUTING.md file.
Updating expect script to be more awesome (master).
The init task now tries to figure out the git repo name.
The init task defaults to * for jquery version.
Tweaks to "jquery" init template.