updates readme

Update README.md

Update README.md

Update README.md

Adds updateLead method and tests for it

Fixes typo in lead urls

Adds new tests for curl

Refactors lead hydration and adds new tests

Updates tests

Updates tests

Removes custom error handler from Lead.php
Merge remote-tracking branch 'origin/master' into feature/add-delete-lead-method

Conflicts:
	src/LooplineSystems/CloseIoApiWrapper/Api/LeadApi.php
	tests/LooplineSystems/CloseIoApi/Api/CurlTest.php
	tests/LooplineSystems/CloseIoApi/Api/LeadsTest.php