Added LoadFLUXNETsites.R, which scrapes the Ameriflux and FLUXNET websites and creates new sites in the database. Will be running on psql-pecan.bu.edu shortly.
Modifield LoadFLUXNET.sites.R to run on psql-pecan.bu.edu and move the site log into the data.atmosphere module
Modified download.Ameriflux.site to use an external file to look up site.id to FLUXNET.id mapping. Moved this file from inst to data in data.atmosphere module so that system.file could find it.
Merge branch 'master' of github.com:PecanProject/pecan
Merge pull request #281 from mdietze/master

Webscrape of Ameriflux and FLUXNET sites -> BETY sites