Making KFileMetaData a framework

[Vishesh Handa]

Hello people

I would like to make KFileMetaData a framework. It's a simple library for 
extracting file metadata and text. It depends on the i18n and KArchive (can be 
made optional), along with a number of external dependencies which are 
optional.

The code is of decent quality, and we have a certain number of unit tests. 
It's currently only used by Baloo.

I would appreciate it if everyone could review the code once before it gets 
into frameworks.
 
-- 
Vishesh Handa