Migrate slim-curve-java component into slim-curve

The structure is now very similar to the ij-launcher project, which has
both a native C and a Java component, all in a single Maven module.
POM: correct formatting of "SLIM Curve"

We decided not to use the dash, but rather write "SLIM Curve" everywhere
for consistency.
Update license headers
Merge branch 'merge-java'

Conflicts:
	pom.xml
	src/main/c/Ecf.h