Restructure GEM
Add Lpaisais::API::Client
Add Lpaisais::API::Client functionality
Add require for lpaisais/api/client
Require 'savon' in Client
Require json in Client
Remove #with_indifferent_access call
Rename Client#build_params (from #build_body)
Add Config functionality
Change Client with config variables
Extract Configuration to file
Modify Client#call as class method
Trim gem functionality to use Lpaisais::API.call
Modify structure to include Client class and module's #call method
Define errors
Implement configuration validation before running Client#call
Update README with usage example