Update of plot script

Needed to modify limits on y-axis for w(a)
Made the axes limits specifiable

- also, user inputs directory name as argument when calling the
plotting script

- modified to include conversion to pdf
modded plot script

changed plot script
Revert "Revert ba3889f..0c32a64"

This reverts commit 362f9d2b7b3e48d5ff5d4298ac10293b8b6f20e3.
rem

remove file (will put back)
Cleaning up code
Minor fixes
Lots of tweaking;
Merge branch 'master' of github.com:jolyonb/deevolve into jolyon
Merge pull request #9 from jolyonb/jonathan

Jonathan
Merge branch 'master' of github.com:jolyonb/deevolve into jolyon
Plotting fixes
Merge issues
Merge pull request #10 from jolyonb/jolyon

Jolyon
Implemented a number of models, wrote instructions for creating a new model
Merge pull request #11 from jolyonb/jolyon

Implemented a number of models, wrote instructions for creating a new model
Cleaned up kessence implementation
Merge pull request #12 from jolyonb/jolyon

Cleaned up kessence implementation
Finished kessence treatment. Moved src to source folder
Merge pull request #13 from jolyonb/jolyon

Finished kessence treatment. Moved src to source folder
some data

data