add ui-bootstrap and materials

update to yeoman generator 0.18 and create bootstrap components optional question

rollback to yeoman generator 0.17 as it's not needed anymore and has other impacts

handle wiredep bootstrap exclusions with new props

first version of material option working

first page layout for material

reproduce angular material sass for css and less

add new options in tests cases

add and fix tests
fix test bower deps version to fix travis
update isVendorPreprocessed and the readme
Merge pull request #137 from Swiip/uibootstrap-and-material

Add UI-Bootstrap and ngMaterials