Determinate inclusion metadata on existence method meta (model serialiser)
Get only appropriate options (use slice method)
Get api_version from options, serialize method for model and relation
Add module declaration into lib/fars.rb
Move module declaration before requires in lib/fars.rb
Add ability to serialize with proc
Add more specs, add ability pass block as item serializer
Change some titles in specs
Add readme
Minor fix in readme
Add list of model serializer options into readme
Fix typo
Merge pull request #2 from shhavel/master

Some impruvements