Add font handling to JRobin, implementing DEFAULT, TITLE, AXIS, UNIT, LEGEND, WATERMARK font tags.
Dont use com.sun JPEG classes directly.
update maven dependencies, and plugins
Add NAN-safe addition operator: ADDNAN
Add operator: NE
Add operator: ISINF
Add operator: ATAN
Add operator: ATAN2
Add operator: DEG2RAD
Add operator: RAD2DEG
Add operator: COUNT

Needs work to make sure this only works with CDef's and not SDef's.
fix whitespace
RRDTool allows "MAXIMUM" and "MINIMUM" as VDef (aka SDef) statements, reduce both to MAX or MIN respectively.
Add Set Operators: SORT, REV, AVG
Add VDEF Operator: STDEV - standard deviation of the values.
Add VDEF Operators: LSLSLOPE, LSLINT, LSLCORREL
  Least Squares Line slope, y-intercept, and correlation coefficient.
Add support for using 'epoch' in start/end times.
Add VDEF definition.
EPOCH p2
StringBuffer -> StringBuilder