init branch graph
started header files
Merge branch 'temp-branch' into graph
pgraph test successful.

Displaying graphs via txt is a go!
cleaned branch graph
updated .gitignore
changes to graph display. Started to use the functions from table.h
saving work, updating Makefile
changes
merged master
major update
* graphing function prototype works
* fixed major bug win getvalue(...) to work with negative numbers
* updated algorithm in getvalue(...) to follow PEMDAS
* added testing file to source to be merged with graph.c and added to graph.h
fixed replce expr bug in getvalue(...)
added more graphing funcs
switching to other branch
merged iss1 fixes
finished graphing funcs
moved strlib stuff to a seperate repo