Updated installation guide on Windows 7
Fixed libsbmlsim installation issues on Windows 7; changed CMake some variable names for disambiguation purposes
Biopredyn package installation simplified; code upgraded to Python 3.X syntax.
Removed unnecessary configuration file for biopredyn setup; -fPIC flags de-activated for non-win32 platforms.
Updated cobrapy to the latest version; added glpk to the list of biopredyn dependencies in setup.py
Temporarily de-activated COPASI installation; fixed broken test in cobra (due to floating-point precision issues)