created function for reading in field obs
modified and renamed to .csv and .tsv files
modified examples for shorter, newer .nc file
added field obs function and tools package
odd bug where dim(endT) = 1, dim(startT) = NULL
trunc_time function added
fix for stupid factors on file read-in
match to field sampling function
added test for unique
resample_to_field method added and tested.
v0.2.2, added tools, field validation methods