Removing the scripts since they aren't used and don't actually form part of the package
Updated the session examples to use Session
rearranged the directory structure to better differentiate session from template code; put all examples in a single common directory; renamed template directories to reflect python naming convention (i.e., lowercase module names)
Reverted the imports to "legacy" PyGrace
reverted additional imports to legacy PyGrace naming scheme and tidied up __init__.py for template code
adjusted the setup.py script and pygrace/__init__.py to reflect 'new' structure and still be fully-compatible with legacy codes