Fix doc for <participating-org>

The documentation mentioned specifying @identifier but should be @ref
Merge pull request #40 from rolfkleef/master

Fix doc for <participating-org>
Changes schema documentation about the percentage attribute.

Since 1.03 this has been changed to be a decimal value.
Reflects changes for the 1.03 release

Needed to change dates, versions and spelling of organisation - including the filename.
Merge pull request #47 from IATI/readme-update

Reflects changes for the 1.03 release
Makes the changes required for  1.04 from Bill's spreadsheet

See: https://docs.google.com/spreadsheet/ccc?key=0AnWngmdQt3stdFJiX2FFS2VnVHc4ZkFFV2JObEV3Z2c#gid=1
Makes the condition element multi-lingual as required for 1.04

See: http://support.iatistandard.org/entries/28296716-Condition-is-missing-a-language-attribute