add Xml encoding

based on some issues people sent me there were some issues reading
non-ascii spaces and other Xml values because there was no document
encoding set.
keep adding the toolbox

While looping through multiple arcpy toolbox calls, one one machine the
tool could not be found unless we added the toolbox each time.
proxy support

Added web proxy support. Need to add a bit of code in the myGizinta.py
file to set proxy values. Only used currently by the Field Mapper.