Add limited support for inverses
Improved error reporting
Make rowvec return a node
Fix bug in usage of PLOT_NUMBER in includeplot
Add inverse to toString
Move tonode inside of listwith
Don't apply pd on empty arguments to includeplot
Correction to 'of' function
Add sum style math operators
Corrections to uncertainty functions
Remove empty lines from aslines output in jdoc
Use \left( and \right) around subscripts and superscripts