added CHANGELOG.txt, TODO.txt and .gitignore
changed geometry files
small changes in I-Cs option file
corrected computing of insolation dt->t
added PO4-DOP model from MITgcm
adapted option and job files for rzcluster
added new N-DOP model, works like MITgcm-PO4-DOP, but more readable
added job and opt file for nesh-fe
Merge branch 'v0.2'