API: `Test` command now takes a path to a directory/file with tests.
API: `Test` command now takes a path to a directory/file with tests.

Prior to the change the command was taking paths in dot notation.

$ li3 test lithium.tests.cases.core
... changes to ...
$ li3 test libraries/lithium/tests/cases/core

Also removing support for case and group parameters.

m4rcsch/lithium-core-library,davidpersson/lithium,SensCritique/lithium,wbeater/lithium,wbeater/lithium,qoqa/lithium,jails/lithium,muyehub/lithium,UnionOfRAD/framework,muyehub/lithium,UnionOfRAD/lithium,pixelcog/lithium,graphis/lithium,SensCritique/lithium,mehlah/lithium,davidpersson/lithium,m4rcsch/li3_framework,whowgames/lithium,datachand/lithium,datachand/lithium,m4rcsch/lithium-core-library,qoqa/lithium,mehlah/lithium,jails/lithium,pixelcog/lithium,graphis/lithium,whowgames/lithium,UnionOfRAD/lithium