Renamed Solution & Project

Renamed solution (LinkedListApp->LinkedListSolution) and project
(LinkedListApp->LinkedListProject).
Wrote FindNodeByIndex, FindValueByIndex

Wrote LinkedList methods FindNodeByIndex & FindValueByIndex. Changed
toolset down from v120 to v110 because errors.
Also added .gitignore and .gitattributes
Wrote IndexOf

Wrote LinkedList method IndexOf.