gnucash-docs: New Branch '2.6.6'

[John Ralls]

        at  https://github.com/Gnucash/gnucash-docs/tree/63d676fe0b91a549236788203f7196f13aa83c61 (tag)
   tagging  0f1ccf1c0e3543940d8848c1b49f0e47539d6f4f (commit)
  replaces  2.6.5
 tagged by  John Ralls
        on  Sun Mar 29 14:51:03 2015 -0700


Release 2.6.6.

Chris Good (1):
      Document Mike Alexander mod to Advanced Portfolio Report

David T (2):
      Inserting Part designations overall
      Tutorial Basics CHapter edits 2015-03-01

Geert Janssens (1):
      Remove obsolete sections about 'Cannot find default values' screen

John Ralls (1):
      Release 2.6.6

Mark Simpson (2):
      Grouping together like sections.
      Sorting by TXF code within Tax Form sections.