[TS/TC][000000] Add rspec
[TS/TC][80582522] Initial mapping implementation
[TS/TC][80737136] Add usage example
[TS/TC][80737136] Bump version
[TC/TS] [00000] add internal gem server and rspec task
[TS/TC][80841074] Fix bug for default attribute names

Previously, when a mapper object was initialized with a hash containing
a key with the name of a mapped attribute, it broke. This commit doesn't
map those attributes.
[TS/TC][000000] Bump version for bug fix
[TS/TC] Be more permissive with activesupport dependency
[TS/TC] Bump version