Remove assumption of user-installed bower

[egaga]

Dependency through npm package management to ui-select does not work without bower: http://ngmodules.org/modules/ui-select

'bower' is not recognized as an internal or external command,
operable program or batch file.
npm ERR! Windows_NT 6.3.9600
npm ERR! argv "C:\\Users\\foobar_000\\.gradle\\nodejs\\node-v0.12.2-windows-x64\\bin\\node.exe" "C:\\Users\\foobart_000\\.g
radle\\nodejs\\node-v0.12.2-linux-x86\\lib\\node_modules\\npm\\bin\\npm-cli.js" "install"

npm ERR! node v0.12.2
npm ERR! npm  v2.7.4
npm ERR! code ELIFECYCLE

npm ERR! [email protected] postinstall: `bower install`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] postinstall script 'bower install'.
npm ERR! This is most likely a problem with the ui-select package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     bower install
npm ERR! You can get their info via:
npm ERR!     npm owner ls ui-select
npm ERR! There is likely additional logging output 

[aganglada]

+1

[jonotron]

FYI, this looks like it will be resolved if/when #982 or #945 is merged

[aganglada]

@jonotron thanks!

[aaronroberson]

This will land in the next release.