Add basic bower:install Rake wrapper

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Invoke bower:install on Travis CI runs

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Configure Travis to install Bower with npm

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Config Travis to build *test-architecture branches

Signed-off-by: Alex Coles <alex@alexbcoles.com>