Added a _lift_greenberg2 method that tries to not instantiate so many parents of overconvergent modular symbols. This code is slower than the current _lift_greenberg and only works for weight 2. It is not being used in the main lift() wrapper but I thought I would put it here in case someone wants to take a look at it and fix it.
Merge branch 'master' of https://github.com/roed314/OMS
Merge branch 'master' of https://github.com/roed314/OMS
modsym.py return error
Merge branch 'master' of https://github.com/roed314/OMS
Indendation errors in greenberg_lift2 in modsym.py