README: Added proper introduction
views/about: Added /about/license route
COPYING: Rename file to LICENSE
README: Added link to LICENSE file
README: Reduced chapter level
README: Emphasize "SkyLines"
README: Added list of major dependencies
AUTHORS: Added "maintainer" flags
README: Improved "Contributing" chapter
README: Added IRC channel
INSTALL.md: Added introduction and moved Vagrant chapter to new file
INSTALL: Updated PostGIS and Python dependency chapters
INSTALL.md: Updated XCSoar tools chapter
INSTALL.md: Reduced chapter levels
INSTALL.md: Updated script paths
Merge pull request #79 from Turbo87/doc

Documentation Improvements
scripts/merge_user.py: migrate another commit() call
scripts/merge_user.py: remove obsolete user_name column
scripts/merge_user.py: copy tracking key
Merge pull request #80 from Turbo87/_max

merge_user.py fixed