adds default conditioning if no preconditioner exists
updated conditioner/solver api to allow for graph setting/getting, added a public Condition function to the greedy solver with an appropriate call warning, updated the greedy preconditioner to ignore commodity weights if they don't exist, and added a condition test
Merge branch 'default-cond' of https://github.com/gidden/cyclus into gidden-default-cond
cleans up old test files if they exist
only rm sqlite if it exists
used more clean_outs calls
Merge pull request #829 from gidden/clean

cleans up old test files if they exist
hot fixed super annoying error in ordering of state variables
Merge pull request #831 from scopatz/ord

hot fixed super annoying error in ordering of state variables
clean up env class
added module section to schema. cleaned up schema. CYCLUS_MODULE_PATH ->
CYCLUS_PATH
tmp
update cyclus.cc
fix compile errors
working on parsing out module specs from input file
moved module xml spec into individual prototype sections. fixed a bajillion compile errors.