Update conf files.

- Remove `bootstrap-select.jquery.json` ([jQuery Plugin Registry](http://plugins.jquery.com/) is deprecated now).
- Update homepage link.
- Update Bower `ignore` option (`node_modules` and `bower_components` synchronized from git repo).
- Remove `grunt-contrib-qunit` from devDependencies (not used).

Edit 1:
- Update Bower `ignore` option (`node_modules` and `bower_components` not needed) Bower synchronized from git repo.

Edit 2:
Bootstrap-select in jQuery Plugin Registry [not found](http://plugins.jquery.com/?s=bootstrap-select).