Import DBH1-4, LI, CI, flags from forestplots

[ashenkin]

Right now we just import DBH1 from forestplots. We should be importing all data from forestplots, including DBH1-4, LI, CI, and flags. All of these might fit in the dbh_measurements table (and so perhaps dbh_mesasurements should change...)

[ashenkin]

fields to import:

• Liana infestation, crown illumination classes, POM & tree height
• tree status and mortality codes
• DBH2, DBH3, & DBH4
• Flags (1-5)
• forestplots wood density figures
• lianas