Merge remote-tracking branch 'upstream/master' into HEAD

Dang
Merge pull request #1 from ugastro-decals/master

ya
Merge branch 'master' of https://github.com/cagostino/IDL-Decal---Students into HEAD
ya
Finished tutorial3
Merge pull request #1 from ugastro-decals/master

Update forked repo
Finished tutorial3
Finished tutorial3
Finished tutorial3
tut3 finish
Merge pull request #23 from SparksterGuy/master

Michael Cox Tutorial #3
Finished tutorial3
Delete tutorial3.pro~
Finished tutorial3
Merge pull request #24 from quanhuynh/master

Finish tutorial3
Merge pull request #25 from dspadoni/master

Finished Tutorial 3
Finished tutorial3

fixed procedures
Finished tutorial3
Finished Tutorial3
Update tutorial3.pro
Delete #tutorial3.pro#