added ability to manually specify file type on .open
Fix broken type inference from currency to float in Excelx

The type inference that Excelx#to_type does is broken for at least
one valid currency format. Check out this xlsx file:

http://scpike-drop.s3.amazonaws.com/broken.xlsx

 > Roo::Excelx.new("broken.xlsx")
 => {[1, 1]=>"1899-12-30"}

The problem is that any format code with a "d" in it that's not in
EXCEPTIONAL_FORMATS is treated as a date. The format code for this
currency has "Red" in it. Rather than hardcoding the list of formats
with "d"s in them that are really floats, can we just assume all
formats with # are floats? My interpretation of §18.8.31 in the spec
says yes.

This is not a problem in Roo::Excel, just Roo::Excelx
Enable CSV files to be loaded from a URI
Format text
Update README.markdown
Merge pull request #33 from cfabianski/patch-1

Update README.markdown
Merge pull request #32 from sleeptillseven/master

Simple text reformatting
Merge pull request #30 from scpike/currency-format-bug

Fix broken type inference from currency to float in Excelx
Move Roo::Spreadsheet into its own file.
Fix that Roo::Spreadsheet.open wasn't tolerant to case differences.
Fixed loading and parsing Excel 2003 xml files
Spec out the loading of Excel2003XML files.
Merge pull request #31 from FoodLogiQ/csv_uri

Enable CSV files to be loaded from a URI
Load the Csv file data at #read_cell time, rather than .new time.
Use while rather than loop/break in Roo::Csv.
Add another datetime format, thanks to @camallen. https://github.com/camallen/roo/commit/22904d6d366d68f82b4f295919e902464fc2c5b5
date format with a time component should be a datetime
Update changelog
Version bump to 1.11.2
Regenerate gemspec for version 1.11.2