[New Content]: Create a new tags system for tagging features of planners

[nergmada]

New Content Proposal:
To help show the diverse properties of planners and better link the needs of the user to the planner they need, this issue proposes a tagging system for creating lists of planners.

Each documented planner will have tags attached to it such as "Temporal", "Satisficing", "Numeric", "IPC2018" to indicate facts such as whether they are a temporal planner or a numeric one and other qualities such as what IPC competitions they participated in.

At the same time, for each possible tag, a page for that tag will be generated identifying what that tag means "Temporal" meaning for example, that a planner supports temporal domains. And at the bottom of that page a list of planners tagged with that tag.

Section:
Reference
Planners

Justification:
Solution to issue raised by user

[nergmada]

relates to issue #35

[nergmada]

Tags for planners proposed as follows from IPC 2018:

• Classical
  • Optimal
  • Bounded Cost
  • Satisficing
  • Agile
• Temporal
  • Satisficing
  • On Board
• Probabilistic
  Additional Tags
• IPC2018
• IPC2014
• IPC2011
• IPC2008
• IPC2006
• IPC2004
• IPC2002
• IPC1998