Further work on leave-k-out analysis
Merge pull request #16 from ns452/master

made more user friendly
Started working on comparing expression and fluxes
finished some auxilliary funs for use in expression/flux comparison
tidied up a bit
fixed a bug in leaveKIrrevOut
fixes and tweaks
finished initial expression:flux comparison
changed leave K out analysis to use a true epistasis definition
added no-threshold for human RNA-Seq processing; initial checkin of old expression perturbation code
added first version of random expression perturbation
small fix for sign inclusion in correlation
added random perturbation figure code
modernized expressionNoise.m, changed it to randomly sample sigma
minor exp noise fix and addition of figures for expression/flux comparison