Initial commit
Squashed 'src/Assets/quickgraph4unity/Dependencies/Mono4Unity/' content from commit a8823af

git-subtree-dir: src/Assets/quickgraph4unity/Dependencies/Mono4Unity
git-subtree-split: a8823af0e004f74e4eae20aa506716c27c5ff164
Merge commit 'c83a2cfeb9aa40c4ee99c69046219846223a1345' as 'src/Assets/quickgraph4unity/Dependencies/Mono4Unity'
- Upgraded to the last version of QuickGraph.
- Fixed compilation errors.
- Removed unit tests (for now) because they weren't compiling.
- Generated the DLLs.