Updating documentation for public facing functions
More documentation updates
Merge pull request #33 from titsworth/docs_update

Docs update
Added George Titsworth in NOTICE
Fixed error with track segment elevation extremes calculation
Merge pull request #35 from titsworth/elevation-bounds-fix

Fixed error with track segment elevation extremes calculation
Test fix

Stupid bug, the parser when called twice returns a GPX with doubled
segments/points. Will be fixed with the GPX 1.1 compatibility.
min_max test
Typoo
url, url_name renamed to: link, link_text
author fields fixed for 1.0 and 1.1
Merge commit '1316cd493f6eafa7861d99294a9fff2acec05567' into tmp

Conflicts:
	gpxpy/gpx.py
Merge commit 'b271eb534cd2f6b358e43e0bda010e110af1ae39' into gpx-1.1--merge
Merge commit '14ec0f03ea96528afeaab17f296eebba2c6a61cf' into gpx-1.1--merge

Conflicts:
	gpxpy/gpx.py
Merge commit '4d3af17b4b5c2bfe4d6e6d4339bb09b58fd1d3cc' into gpx-1.1--merge

Conflicts:
	test.py
Merge commit '393d1fe494cb362d0360c4002c9b7cbc1b16e1c6' into gpx-1.1--merge
Missing extensions in GPXTRackSegment