Imports cleanup
Deleted LibGDX default font acquisition

There is no need to load default Arial if it doesn't used from
libgdx-binded side on its own
Removed deprecated methods and ambiguity
GossipScriptEngine ambiguity removed

Static methods cannot be overloaded. They are only hidden, not overriden
and will be invoked by declared type. There is no need to call static
method from instance.
GossipScriptFactory cleaned unused imports
commented out serialVersionUID in Sema

It is not serializable, but is was intended to be(probably). Will keep
it as comment if engine will get an update someday.
SmallInterpreter type safety fixed
SmallInterpreter warnings suppression review
SmallInterpreter JList-related typesafety cleanup
Merge pull request #32 from Itaros/cleanup

Heavy cleanup