updated read.settings to set defaults for run/outdir
fixed read settings gh-56
Added a .r the reading of ED2 history files in order to properly read in PFT defauls for specific ED2 revision
Merge pull request #56 from PecanProject/settingsfix

updated read.settings to set defaults for run/outdir
Merge pull request #57 from serbinsh/history

ED2 history files