Fix toolbox names, also fix the add-in

I noticed that the 'Esri to Open (multiple)' script a different capitalization then the others so I fixed it by changing it to 'ESRI to Open (multiple)' then while I was there also fixed the actual names of the tools, they are now

- esri2open
- esri2openMerge
- esri2openMulti

lastly since I was already mucking around in the binary .tbx file I merged in all of the changes from #9 and fixed the paths so that toolbox would point to the correct script when your in 10.0 and the esriopenaddin_addin.py would refer to the correct internal script names.