jquery.i18n.messages.js should be called messagestore

 * Rename jquery.i18n.messages.js to jquery.i18n.messagestore.js
 * Also related changes in demo/ and test/ folders

Issue: 45
Update CLDR plural rules to version 24

Uses updated CLDRPluralRuleParser
Adds decimal support for plural calculations
Sort the language codes alphabetically in plural rules
Ignore JSHint warnings for double quotes
Merge pull request #47 from siebrand/4

Ignore JSHint warnings for double quotes
Merge pull request #46 from kartikm/messagestore-rename

jquery.i18n.messages.js should be called messagestore