Add non-dist files to bower.json ignore property.

[jdufresne]

When distributing the package through bower, all build, test, and documenation requirements can be ignored. Users only require the files in dist. Results in a smaller package and faster deployment.

[javimbk]

This is needed. Right now there's too much on the package that's not really needed. +1

[trentrichardson]

Thank you, sorry for the delay.