Added line to set working dir to qp02/

Moved the line where we are changed to POSIX so it prior to merging.

Within the as.POSIXct statement, hard specified the timestmap format used in our campbell logger system (%Y-%m-%d %H:%M:%S)
identified iss002 with MergeSynth (function_synth_00.R)
Fixed the merging dataframe loop.
Figured out how to calculate monthly growht using endpoints() {xts}

Figured out how to convert an xts object to a matrix.