create SimpleGraphPath class with edge list test
use correct parameter order for assertEquals
ensure simple graph path vertices are valid
remove unnecessary comment
implement and test start/end vertex methods
add JavaDoc
minor formatting change
add JavaDoc to constructor
add JavaDoc to getVertexList()
implement and test getWeight
organize and collapse imports
add header license info
store path after validating in constructor + use double for path weight
add changelog
Merge pull request #74 from rolodato/master

Add SimpleGraphPath (vertex-based paths for simple graphs)