New interface Fn extends Callable that is used as a minimal "invocable"
interface for functions.
Remove unused imports
Bump version to 0.0.5-SNAPSHOT before possible structural changes.
Merge branch 'stable'

Conflicts:
	funcish-clojure/pom.xml
	funcish-core/pom.xml
	funcish-guava/pom.xml
	funcish-parent/pom.xml
Added .repeat utility methods to return a Mapper/Predicator/Sequence
that just repeats a particular value indefinitely.
Drop -SNAPSHOT for release
Merge branch 'release/0.0.5' into stable