Modified the Makefile slightly so that the 'make test' command will
compile all the code meant for testing purposes.
Added tests for the setVertex() method in the Line class.
Made minor adjustments to Line class header and did some work with the test
cases for the classes.
Merge branch 'master' of https://github.com/shamor/Senior-Design-I

Created header file for DFS.cpp file. Adjusted files to include  dfs.h
instead of *.cpp files.

Conflicts:
	Makefile
	tests/vertexTests.cpp
working on DFS
Have DFS class working and test class written.