Change salesforce_mapping index to be non-unique
Make triggers optional. Remove validation on previously unique salesforce_mappings.
Remove salesforce_record_type_default from index
Validate mapping form for duplicate mappings with the same trigger
Fix typo in comment
Merge pull request #69 from thinkshout/multiple-mappings

Allow multiple mappings for the same entity/bundle/sf object/default record type so long as the triggers are unique.