Change authors informations
Fix copy/paste typo causing messing upon scope of a variable.

'url' var have to be an instance variable, not a class's one.
Ensure Response always hold private store to refere to.

Avoid inexecpected failure while fetching informations into @response
Increase version number to v0.1.2
Remove useless and inefficient encoding declarations
Security feature.

Roempro::Class provide a way to define secrets attributes.
Roempro::Class#inspect is override in order that values of attributes
into the hidden stack aren't displayed.
Improve security when submit informations to Roempro::Request
Use POST instead of GET to request the API
Retry the request when session timeout
Increase version number to v0.2
Edit the CHANGELOG