Added search for projects by name to api

GITLAB-1283 (GITLAB-869)

Change-Id: I611e7e93f6292de08e1edc8d3ea77cf9087b6ded

Conflicts:
	config/initializers/1_settings.rb
Added missing API documentation

Change-Id: I1337ee7ff51d018d6f62d447345032597e84269f
Used pagnation function from api helpers

Change-Id: I1bdd3608d3b46924b5da3ae282c99f85ee4e0dab
Merge pull request #5146 from karlhungus/feature-api-search-for-projects-by-name

Added search for projects by name to api