gemspec: include all files from git repo

Signed-off-by: Zeljko <zeljko@zwr.fi>
add zwr icon files

Signed-off-by: Zeljko <zeljko@zwr.fi>
load all rake task files to the using rails app

Signed-off-by: Zeljko <zeljko@zwr.fi>
zwr app generator started

So far we generate the app as we want it, add/remove gems and bundle,
add to git and even add origin remote repo. Also we copy the zwr
icon to the public folder.

More actions would be done in the rake task.

Signed-off-by: Zeljko <zeljko@zwr.fi>