Small adjustment to fix Windows 7 path issue

[ticktronaut]

To get your script to run with Windows 7 we had to fix the eagle path in eagle-diff.py from

eagle_path = "C:/Program Files (x86)/EAGLE-6.1.0/bin/eagle.exe"

to

eagle_path = '"C:\Program Files (x86)\EAGLE-6.2.0\bin\eagle.exe"'

Without the "0\bin" the string gets mutilated to
"C:\Program Files (x86)\EAGLE-6.2.in\eagle.exe"

Thanks for this handy tool!