Adding travie CI
Tweak
Adding diffusion_tau_leap algorithm
Parameters can now be updated dynamically
Gillespie can now output discrete time steps
Updated Gillespie documentation
Adding diffusion tau leap method
Add a minor comment
Bumped version and changed to gmail email address
Adding the tau leap algorithm. Bug fix the pleap
Merge branch 'dev' of github.com:csgillespie/In-silico-Systems-Biology into dev