Merge pull request #346 from gusferguson/training_update_April_13_1

Training update april 13 1
Changes to collaboration.txt for 4.4.8
Update 6 image for collaboration.txt for 4.4.8
Update 4 images for getting-started.txt for 4.4.8
Updating 3 images for imagej.txt for 4.4.8
Updtae text and 2 images for importing-data.txt for 4.4.8
Updating 4 images for managing.txt for 4.4.8
Updating 1 image for each of output.txt, scripts.txt and viewing-data.txt for 4.4.8
Update text and 1 image for web-client.txt for 4.4.8
merge dev_4_4 -D org -I include -E exclude: PR 368 (Cpp: Correct content and markup)
merge dev_4_4 -D org -I include -E exclude: PR 380 (Training 4 4 8 update june 3)