Bug 561749 - Provide metadata-based Equinox Preferences API

Metadata-based Preference API and implementation
Javadoc and unit-tests

Change-Id: Ifd1b6fc7bfdf98709fb24691721a9c4feadf1f0d
Signed-off-by: Alexander Fedorov <alexander.fedorov@arsysop.ru>
14 files changed