Create README.md
added hyperlinks
initial commit of exercise 11
added comments & shorter input alternative
added input conversion to integers & floats, plus BMI calculation
added finished exercises from previous round of study
added finished ex13.py from previous round of study
added command argument conversion, type checks and exception handling
tested condensed versions of handling multiple exceptions
clearer output of data type checks
added finished ex14 from previous round of study
initial commit of ex15
commented & corrected ex15; added Study Drill 7
converted argv from ex15 to raw_input (Study Drill 5)
clarified file variable name
clarified file variable names again, based on CSQs
initial commit of ex16
commented ex16 & added Study Drills 3-5
completed ex16 Study Drill 2
initial commit of ex17