Start removing compatibility for Python < 2.6
Use floor division operator instead of function
Inline the effect of intbool() function
Remove code for Python < 2.2 in xlrd.xlsx
Add test for xlrd.formula : binary operation returning boolean
Remove unused BUFFER
Zoom into test sheet to exercise some more code.
Simplify setup.py and MANIFEST
Merge pull request #31 from takluyver/simple-setup

Simplify setup.py and MANIFEST
correct some comments
Remove invalid encoding lines.
Remove unused and duplicate imports.
Remove html from comments.
Since we now only support Python 2.6+, all books are pickleable.

(As an aside, assume that current versions of IronPython also have an array module)

Fixes #14, will sort out documentation branch later.
Merge takluyver:modernise to get rid of a bunch of old code needed when xlrd supported Python < 2.6
Test moved over from xlutils.
Prepare for 0.9.1 release.
bump version for up-coming work
Don't ignore this file, painful experience suggests it may need to be deleted before doing a release.
test with some .xlsx files provided by John Machin