List Python resources in separate file
Rename python_resources.md to Python_resources.md
Update README.md
Rewording and adding Next/Previous
Create phonenums.txt
Update 2_Flow_Control.md
Changed IPython to Python prompt
Update 1_Data_Types.md
Changed to volts+current
Fixed typos
Fixed typos
Fixed typos
Added functions
Fixed bugs
Fixed bugs
Fixed bugs
Merge pull request #64 from apawlik/2013-04-manchester

Fixed some typos and added to Python material