Added static cache to meter implementation according to
java.lang.Integer.
Merge remote-tracking branch 'origin/master' into static-cache-feature

Conflicts:
	target/sius-0.0.1-SNAPSHOT.jar
Merged master into branch.
Added preferences and config file. Added dynamic cache within context of
little service provider framework. Embedded cache in meter
implementation. Updated jars.
Little fixes to cache interface, in order to have cache accept and
return concrete types.
Convert method in meter impl now makes use of valueOf method. Added unit
tests for meter impl. Added junit dependency in test scope.
Created frame work for unit composition. Added composite dimensions
speed and area. Added two speed units. Added hour unit (for miles per
hour).
Added comments.
Update README.md

Added CI link.
First draft for multiplication of composite units.
Implemented multiplication for fraction units.
Added build status image to readme.
Merge branch 'unit-composition' of ssh://git@github.com/mbe24/sius.git
into unit-composition

Conflicts:
	README.md

Added comments.
Merge branch 'master' into unit-composition

Conflicts:
	src/main/java/sius/unit/length/MeterImpl.java
	target/sius-0.0.1-SNAPSHOT-javadoc.jar
	target/sius-0.0.1-SNAPSHOT-sources.jar
	target/sius-0.0.1-SNAPSHOT.jar
Modified .gitignore
Merged into master.