Fixes Issue #202 Axes are borked in Bar3DChart
provide a better default for dispBlanksAs and allow it to be configured
fixed bad test case and bad code for dispBlanksAs (setting now actually makes it into XML)

This means there are many other test cases in the suite that are not verifying what they look like they're verifying.
Merge remote-tracking branch 'randym/master'

* randym/master:
  escape formula for conditional formatting
  fix typo in specs
  added sparse array transposition with blocks for rows/cols switching and some docs updates for release prep
Fixes Issue #202 Axes are borked in Bar3DChart by requiring axis order in the constructor
Merge pull request #203 from moses/master

Fixes #202 Axes are borked in Bar3DChart