Meta: Add automation functions to web interface

[maxpearl]

Automation functions, such as adding new mirrors, deleting, replacing, etc.

[maxpearl]

1) #57 Allow editing of individual domain alternatives
2) #51 - adding content of alternatives (with editing possibilities) to domain editing screen
3) #58 Implement adding new mirrors in the domain editing screen
4) #59 Implement deletion of alternatives
5) #78 Add new domain
6) #61 Implement programmatic automation to edit/add/delete mirrors.