matrix 7.x-2.0

This is the first stable D7 release and might still have some problems, the following issues have been included:

#1810080: Validation fails for forms that don't label save button as "Save"
#1536524: Undefined index
#2005612: Insert configuration AJAX form directly below/within the row being edited
#2005604: Settings from one matrix field affect the settings of other matrix fields for the same entity
#1914120: Impossible to enter zero in field
#2086249: When row count is a fixed size, and row titles aren't specified in the field UI, table headers have one more column than data