Additions for improved BlockType-system (adds hay, ender-portal-frame, improved lever-facing)

This changes are needed for this PR: https://github.com/GlowstoneMC/Glowstone/pull/566 (improved Block/ItemType-System).

Adds:
- EnderPortalFrame-MaterialData
- HayBlock-MaterialData

Modifies:
- Lever-MaterialData: setFacingDirection takes now notice of BlockFace.UP/DOWN. Old behaviour was to ignore this values silenty.

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_Edited by turt2live_

- GlowstoneMC/Glowstone#566
Missing javadocs