Update tour.txt

Made a couple of typo correctios.
Merge pull request #1731 from cristinao/master

Update tour.txt
Added Cristina Ospino to AUTHORS
Added Patrick and Derek to the PRIMARY AUTHORS
Don't enable the default site after removal

It may not exist at all and causes installation to fail. Fixes #1732
Updated changelog for version 2.4a9
Updated changelog for version 2.4a10
Fixed recursive .git symlink
Move to postgis2 on Ubuntu 14.04
Updated changelog for version 2.4a11
Decrease verbosity level in installer
Removed unused popd
Updated changelog for version 2.4a12
Fixed missing dash in pip install
Updated changelog for version 2.4a13