remove modifier
Merge pull request #10 from otaviojava/clean_code

remove modifier
UNITSOFMEASUREMENT-32: Remove functional interfaces that are out of
JSR-363 scope 
Merged UnitConverter and general base interface
Task-Url: https://java.net/jira/browse/UNITSOFMEASUREMENT-32
Added links to javadoc, slides and draft specification from the Maven generated home page.
Fixed a build error in the "index.apt" file.
Set the URL to snapshot repository (UNITSOFMEASUREMENT-41).
Updated JavaDoc