v4.0.2 - Tab Rename Fix

Release to fix tab rename bug in uSync (umbraco 7.5+ i think)

Fix #160 - property values can get lost when you rename a tab

renaming a tab could loose you property values, as usync was removing and then replacing properties (via it's remove tab function) - I think this is a fairly newish bug - but i can recreate it on Umbraco v7.5 so it's been there for a while.