Merge pull request #27 from MichaelMahlberg/master

Complete pattern "Introduce Boy Scout Rule"
Fix #16: publish only if GH_TOKEN is present
* pattern index now numbered (70 entries so far, impressive!)
* cross-cutting now contains improvement-backlog + diagram
renamed "Never-Rewrite-Running-System",
https://github.com/aim42/aim42/issues/25
Facade pattern
* slight corrections to Boy Scout Rule (typos)
* renamed to "Boy Scout Rule" (dropped the "introduct")
* renamed file...
* corrected links/anchor
Merge branch 'master' into bn
Reference name, heading levels
Merge pull request #28 from BoronNitride/bn

merged #28 from BN (Facade) - thanx!
* introduced "explicit assumption"
* some more "evaluation"
* move evaluation stuff, link to "Software Estimation"
* moved "root-cause..." to analyze-directory
Renamed boy-scout-rule back to introduce-boy-scout-rule #7

  Re-introduced old name according to https://github.com/aim42/aim42/issues/7
  Kept other edits.