move configuration to a new file
wip: Move to service structure.

The idea es to have RestangularService instead of the service object
result of createServiceForConfiguration.

Instead, we use new RestangularService(config).

Also, RestangularElement & RestangularCollection should keep a reference
of the RestangularService, which they will use to forward several calls.
Adding Promise Extension
move customOperations to RestangularBase
move fetchFunction to RestangularService.fetchList

It's not working yet, since there are some unmet dependencies
like $http and $q.

TODOs and FIXMEs are there instead
move withHttpConfig()
custom* aliases were missing
move elemfunction to RestangularService

Also move internal function: parseResponse & resolvePromise
finish moving all to Service. Creates public adapter
fix: unbinded this on each() call
remove unused restangularFields
move config.isSafe to utils.isSafeOperation
remove unused method restangularizeElem&Collection
fix: reference to service to publicAdapter
Cleaned configuration
Moved to restangularService
trying to put tests back online.

urlCreator:
Contains an initial version of makeRequest()
a replacemente of resource()