added a basic swap program

[SrivastavaSatyam]

trafficstars

Just, a few line of code....and number swaped .For the one new to the python

[Akuli]

Can you put it to one of the .md files along with an explanation of what it does?

Even better, can you break the code and turn this into a "fix this code" exercise?

[Akuli]

I guess I can move the code into some .md file myself. I don't know when I'll have the time to do that though.

[SrivastavaSatyam]

I'll try to add, if I could in the way u had .