Taskserver Documentation Update

The Taskserver setup documentation has been significantly improved. The setup page is:

Setting up your own Taskserver

The sub-pages now cover single topics:

Pre-Installation Preparation
Install binary package
Install from tarball
Install from git
Server Configuration
Server Start/Stop
Add User to Server
Configure Taskwarrior
Syncing Taskwarrior
Troubleshooting

Feedback on the new pages would be appreciated.