Odf number formatting

@moggi , Please have a look at this. I know that the ~700 line hunk could cause cancer to the eye :-) . Otherwise, all the other commits are brief. The following styles(along with their sub-elements) have been implemented in this branch :-

1. Number style : and scientific, fraction styles
2. Percentage Style
3. Currency style : Without the support for regional language or country (since we didnt have a map for it in orcus.)
4. Date style
5. Time style
6. Text style
7. Boolean style

I have also restructured the ods styles tests into functions. Thanks.