Set project root as default locaion for .bowerrc

If project file is exist, bowerrc command will create/read .bowerrc file
in/from project root directory, instead window.folders()[0]
Set correct installation  path
Add "Install dependencies" command

Add "Install dependencies" command for download and install dependencies
according bower.json, by "bower install --save" command. I think this
feature will be helpful for users.
Merge pull request #35 from diablero13/master

Set project root as default locaion for .bowerrc