Created stack structure for tracking commands and 'current' nodes
fixed compiler error
Merge branch 'master' of https://github.com/howie8/hw2

Conflicts:
	hw2.c
	tdlist.c
	tdlist.h

Prepared for merging(?)
Fixed conflicts
Added test files
Now possible to undo 'a' command
Undo function mostly finished. Added target output files.
UNDO completed and tested
Minor tweaks to 'undo'
Merge branch 'master' of https://github.com/howie8/hw2 into howie8-master

Conflicts:
	hw2.c
	tdlist.c
	tdlist.h
Merge pull request #3 from csah632/master

Final merge