add pek2d forward module
pek2d and pek1d updates
pek2d remove find directory function

moved to utils
commit change to filehandling here as well
pathlist search bug fixes
pek2d commits
new module pek2d to deal with inversions
changes to pek2d to incorporate inversions
pek1dplotting updates
pek1dplotting updates
pek1d plotting and class updates
pek1dplotting updates
pek1d plotting updates and small pek1dclasses updates
pek1dplotting updates
merge ak.pek to master