Added three files to photosynthesis module

C3 Species.csv
C3 photomodel.r
Documentations.docx
Clean up tests.
Switch to PostgreSQL
clean up dbfiles

reuse duplicate code
search for inputs inside a time range, not exact match
fix db get traits code

original code was correct to use covariate.data and not covariates.data
use export not S3method
small tweak to run update.psql on the mac.
fix error in script, fetch database from ebi-forecast
store correct path to workflow
more fixes to work with pdo
updated workflow to work with history in web app.
fix model id on vm
don't write finished in database if no workflow id is saved.
add status file to workflow.R (redmine #1924)
Merge pull request #1 from PecanProject/master

Update my branch of pecan with vm workflow.r fix
outline of met2CF function based on Ameriflux as Met to convert
Merge branch 'master' of https://github.com/jam2767/pecan
updates to connect to bety
helper to copy settings and remove any run info
forgot to add clean.settings.R to DESCRIPTION
simple script to create a clean pecan.xml