Descriptions added/changed, cg_run removedd (obsolete)

Descriptions taken from: http://web.archive.org/web/20080327004255/http://www.rtcw.jolt.co.uk/content/enemy_territory/cmdcvarlist/index.html
Merge pull request #26 from harleking/patch-1

Descriptions added/changed, cg_run removedd (obsolete) refs #225