[Change] Added Configuration pattern for path, limit and formatter parameters
Update README.md
Merge branch 'master' of github.com:c4mprod/grape-batch into configurator

Conflicts:
	lib/grape/batch.rb
Merge branch 'configurator' of github.com:c4mprod/grape-batch into configurator
[Change] Fixed unit test random error with static Grape::Batch::Configuration object