added isDragging and formatValue to slider
Add 100% moar Gradle.

Restructure repo to Maven standards, add build.gradle and related, remove Ant XML files, add Gradle wrapper, fix compile error in DisposableDynamicTexture.
Merge pull request #19 from Emberwalker/gradleness

Add 100% moar Gradle.
ew!
Yeah I'm a fool.
Change item spinner to use safer render type
Fix compilation error in some Java versions
Fix build script and version info
Rework GenericTank
Some kind of unit thingie