#3 extracted php client; added git submodule
#3 fixed php client intialization
#3 Fixed typo and removed boilerplate license header
Merge branch 'master' into feature/3_extract_php_client

Conflicts:
	laterpay/library/LaterPay/Client.php
	laterpay/library/LaterPay/Client/Signing.php
#3 cleaned up library folder
#3 fixed submodules
Merge pull request #321 from laterpay/feature/3_extract_php_client

Feature/3 extract php client