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
Merge pull request #7 from loopline-systems/feature/add-update-lead-method

Merges Feature/add update lead method
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