Create README.md
Change URL for 0.2.0.
Merge pull request #2 from Natim/0.2.0_dev_compliant

Change URL for 0.2.0.
Implements the new workflow.
Fix register arguments.
Remove closure that is hidding the callback variable.
Fix the certificateSign method.
Fix MSISDN not mandatory.
Merge pull request #3 from Natim/0.4.1_new_worflow

New 0.4.1 API workflow
add server field