Tell people to install grunt-cli

To run the frontend, grunt-cli has to be installed globally.
Add bower as dependency.

Bower was not a dependency in frontend, but used. This does not assume
that everyone has bower globally installed.
Merge pull request #28 from ninjadev/packagejsonify

Add path to makefile and bower as dependency
Increase flycamera rotation and movement speed.
Keybinds. Reset camera rotation button. Cleanup.
Merge pull request #31 from ninjadev/camera-improvements

Camera improvements
Fix bug with keybindings and input fields