rename the generic_spreadsheet to base
Adds failing test for numbered sheet names bug

Code makes assumption from filenames that if sheet2.xml exists,
sheet1.xml will exist.  Test case attempts to read all sheets from a
file that only has sheet2.xml.
Fixes bug with missing sheetN.xml files in XLSX

Workaround is to omit nil values from the array which was inserted into
via numeric indices.
Add support for CSV export of boolean XLSX columns

This treats boolean columns as "true"/"false" strings when exporting to
CSV.

Includes tests.
login with access_token to get spreadsheet from google drive
extract session setting block into a private method
Merge pull request #61 from cecillem/login_to_google_using_access_token

Login with access_token to get spreadsheet from Google Drive
Fix gemspec
Merge pull request #57 from camallen/fix_gemspec

gemspec fix: rename the generic_spreadsheet to base
Add a changelog entry for #61. Fixes #60.
Correct the version string. Fixes #56.
Remove some old code for db-logging the test runs.
Fail noisily in #key_of test helper, as the original author intended but didn't achieve.
Remove the local_only test cases. Without the source data they're useless.
Update gemspec.
Remove Roo::Excel#formula, #forulas, #formula? outright, as they have always been placeholders
We only need one private declaration per class.
Drop the #minutes test helper, which we're no longer using.
Revert "Remove Roo::Excel#formula, #forulas, #formula? outright, as they have always been placeholders"

This reverts commit 0599f386c15586926beb59c0cce10d0799fa9aff.
Instead of removing them entirely, raise NotImplementedError for Excel#forumla methods, as all the other classes implement them.