added github param

 * flag to process or not github repos
 * default: true
added coderwall param

 * flag to process or not coderwall badges
 * default: true
coderwall preparation

 * json sample
 * test api urls
display coderwall badges
filter coderwall badges
improved visual
it should only fill existant div.repository if allGithubRepos is false
cleaning json fixtures & specs
use fixtures in demo
Merge branch 'feature/select-repo' into develop
Merge branch 'feature/coderwall' into develop

Conflicts:
	demo/index.html
	spec/githubSpec.coffee
	spec/paramsSpec.coffee
	src/githubRepo.coffee