Fixing some wording in the design documentation.
Use American English for "behavior" in docs.
Prompted by plaes on #pocoo, mitsuhiko confirmed to use American English.
Added a note on the behaviour of the routing system
Interlinked design docs better
Updated design decisions. This fixes #63
More typo fixes.
Fix some typos.
Fixed some minor typos throughout docs.
Proofreading the documentation
Added support for macro pulling and documented certain design decisions.