Update README.md

Update datafile link

Adds link to thesis PDF.

Fix hanging bullet point

Add links to logs and videos

Removes .m files which have been moved to the simflight repo.

Small changes.

Line wrapping

Update license to fix formatting and revert to original BSD language

Update license date

Build gtest in build-all.

Merge branch 'master' of github.com:andybarry/flight

small change.

Adds link to technical video to readme.

Small fix and an annoying thing for matlab.