Started work on Invariants and Zombies (issue #32)

  Just set up the structure, exted the biography and filled in the short description.
Included Biran Foote's famous "Big Ball of Mud" Paper in bibliography
Merge remote-tracking branch 'origin/instrumentation_and_invariants' into instrumentation_and_invariants

Conflicts:
	guide/src/asciidoc/bibliography.adoc