add rspec
restructure files; add Client class
add rest-client and webmock
require spec_helper and refactor client
create spec file for locale
add spec_helper for all spec files
implement request and locale
add project type spec
implement project type module
remove require statement and refactor a bit
fix path
add project group resource
implement show project group
add spec for create project group
implement post request method
implement create project group method
add parameter checking
add header checking
add delete project group method
fix get method query string