Add 'documentation/' from commit 'ad1d6234e17582f26ab66687c7066c562debef4d'

git-subtree-dir: documentation
git-subtree-mainline: 8501fe9a1e5c2c1248396a6bd999a09e67b3a223
git-subtree-split: ad1d6234e17582f26ab66687c7066c562debef4d
Move documentation Travis config to main

Change-Id: Id346e76e29fb49c3672310b136822ed2a1e8082a
Signed-off-by: Thanh Ha <thanh.ha@alumni.carleton.ca>