added a simple Gruntfile
The grunt-build is semi-functional.

Removed underscore.js from the sources - using it from the node module now.
Merge branch 'master' of github.com:ngn/u into grunt-build
WIP - fixed some issues

 1. Fixed travis config for grunt
 2. Removed accidentally committe compiled js files.
 3. Added wrapper build script
 4. Updated the toplevel .gitignore
 5. grunt.coffee is the build configuration file now
Merge branch 'master' of github.com:ngn/u into grunt-build
Removed unneeded file variables in grunt.coffee
Creating all the needed directories before build
Using locally installed binaries for the build.
Removed node 0.6 from the testing platforms
WIP - almost finished the doctest task
Merge branch 'master' of github.com:ngn/u into grunt-build
Compiling stdlib in its own directory
Merge branch 'master' of github.com:ngn/u into grunt-build
The doctests get run properly
Merge branch 'master' of github.com:ngn/u into grunt-build
Minor fix in grunt.coffee - using multiline strings.
Added a clean task and updated .gitignore
Removed the unused dev libraries from package.json
Updated ignores.
Updated ignores