Add support for array formulas.
Fix sanitizing and some cleanup
Merge pull request #294 from jurriaan/richtext-fixes

Fix sanitizing and some cleanup
Array forumla tests.
Merge pull request #295 from tafryn/arrayformula

Added array formula support
sourceLinked should be false (0) when specifying a format_code for an axis
Add tests for checking formatting and sourceLinked properties when setting formatting on an axis
Merge pull request #162 from croby/format_code

sourceLinked should be false (0) when specifying a format_code for an axis
Fix cell merging, #179
Merge pull request #296 from jurriaan/fix-cell-merge

Fix cell merging, #179
Small fixes
Merge pull request #297 from jurriaan/small-fixes

Small fixes & cleanup