Update URLs
Merge pull request #29 from Croydon/patch-1

Update URLs
Use  stdlib version of the new op
Basic implemetation of SNode structure.
Using cherry-pick from mapc's tools.h fix for C++ Standard Library.
added flowgraph header file and subdirectory in /engine
Less verbose travis notifications
configured travis webhook to only push success and failure messages as requested by @a_teammate
configured travis webhook to only push success and failure messages as requested by @a_teammate
Fixed & updated logo link.
Undo (last two) mistaken commits
ignore pending messages from travis
Particle limiting
camera entities only files
Merge remote-tracking branch 'origin/master' into aschaeffer/particles

Conflicts:
	.travis.yml