Describe pattern structure, how it corresponds to ROSE algorithm, how to create patterns

[apoller]

• [x] Description of pattern data structure
• [x] Description of algorithm to apply patterns (analysis of DOM tree, event watchdog)
• [ ] Guide to how to develop own patterns
• [ ] short explanation of the activity trackers

[eppfel]

WIP: https://github.com/secure-software-engineering/rose/tree/master/docs WIP https://pad.epp.cloud/EYMxE5gEwRgZgLRQKZwAwICwGMDsjwBDQxKTEAJkwA5C0KK0A2IA