Remove notabs task, and simplify some Cakefile code
Add uglifyjs as a dependency and use the local version for minifying
Prepend commands with 'node' to make sure they run on Windows

Also I've required modules that we call from the command line. I've done
this because that'll make it clear if the user haven't installed all the
dependencies with '$ npm install'
Merge pull request #640 from saebekassebil/delicious_cake

Delicious cake