Add support of smartling.client_lib_id directive

[dimitrystd]

Smartling FAPI v1 was extended, now it accepts a string with additional information about client application.

DoD:

• Add the new method setClientUid(String name, String version) to SDK
• Call of method above is optional. SDK must send in this case
  • Name of SDK = smartling-api-sdk-php plus its version
  • Exact format of strings {"client":"smartling-api-sdk-php","version":"1.0.0" }
• SDK must add smartling.client_lib_id directive to all Upload request into request params (not a file body)
• Unit test is added which verifies that any Upload request contains smartling.client_lib_id directive

Example of implementation in java sdk

[dimitrystd]

Reopened. Current implementation doesn't cover one of important case

SDK must add smartling.client_lib_id directive to all Upload request....

Let's see on example

sdk = SmartlingFileApi::create('projectId', 'userIdentifier', 'secretKey', null);
sdk->uploadFile('/tmp/1.xml', '1.xml', 'xml');

As result file is uploaded but without smartling.client_lib_id directive.
Updated DoD with unit test

[paveldhq]

done