Raise projects per page limit

By default GitLab API show 20 projects, we can raise this limit up to 100

i think this is strange idea using pagination in api, instead simple limit :)
https://github.com/gitlabhq/gitlabhq/tree/master/doc/api#pagination
https://github.com/gitlabhq/gitlabhq/blob/master/lib/api/projects.rb#L28