problem 11 solution in python 2
problem 12 solution in python 2
.gitignore from https://github.com/github/gitignore/Python.gitignore
wrong .gitignore
Merge branch 'master' of github.com:therealjumbo/euler
added solution to problem 13 in python 2
added solution to problem 14 in python 2
added solution to problem 15 in python 2
added solution to problem 16 in python 2
added solution to problem 17 in python 2
added solution to problem 20 in python 2