Update salesforce-api.php
Finish the tweaks to the code

Issue with shortcuts and early PR commit :)
Version 2.5

Re-wrote Web-To-Lead, added starter tests.
Merge pull request #25 from sc0ttkclark/patch-4

Support SforceEnterpriseClient via filter toggle (defaults to using SforcePartnerClient)
Version 2.5.1

Thanks, @sc0ttkclark
Add new Salesforce create method (upsert) to avoid duplicated values.
Created new setting on Feed Edit screen to select the primary key field.
Add new Salesforce create method (upsert) to avoid duplicated values.
Created new setting on Feed Edit screen to select the primary key field.
Merge with v 2.5.1