Added the brightness plugin to ng-cordova
Changed repo link, and added setKeepScreenOn function

Changed the link to the plugin repo back to the created because of pull
request accepted. Added the setKeepScreenOn function
Added appRate to demo.

Signed-off-by: Simon Reimler <Simon.Reimler@bertelsmann.de>
Minor changes.
Merge pull request #507 from saimon24/fix-appRate-plugin

AppRate functions in demo-project
fix(plugin:appRate): rename to lowercase
fix(plugin:statusbar): isVisible is not method
fix(plugin:FB): refractor out init --> now set in config using $cordovaFacebookProvider
feat(plugin:appVersion): new plugin AppVersion

https://github.com/whiteoctober/cordova-plugin-app-version
fix(plugin:appVersion): add dependency to module
chore(rebuild): dist
Update README.md
fix(tests): statusbar
Merge branch 'master' of https://github.com/driftyco/ng-cordova
feat(plugin:appRate): refractor to use Provider more
fix(plugin:media): fixing methods previously borken
new(plugin:imagePicker): new plugin
Update README.md
new(plugin:actionSheet):
Update README.md