Maven cleanliness and API progress

The project was very messy and due to older Bukkit packaging conventions, 1_4_5 and 1_4_6 were sorted away from the rest of the versioned code. All of the versioned internals are now submodules of the internal module.
Rather than use the hackish existing method of abusing the shade plugin to combine "dependencies" for a dummy assembly project, we're actually using the assembly plugin.
Profiles are still split up between the parent pom and the internal module pom, but they're much more clean.

The API is now its own module and can be compiled and released as a separate file for developers. Soon, Bukkit ticket 20, you'll be closed.

plugin/src/main/resources/plugin.yml

@@ -1,50 +0,0 @@
-name: OpenInv
-main: com.lishid.openinv.OpenInv
-version: ${openinv.version}
-author: lishid
-authors: [Jikoo, ShadowRanger]
-description: >
-             This plugin allows you to open a player's inventory as a chest and interact with it in real time.
-commands:
-  openinv:
-    aliases: [oi, inv, open]
-    description: Open a player's inventory
-    permission: OpenInv.*;OpenInv.openinv
-    usage: |-
-           /<command> [Player] - Open a player's inventory
-  openender:
-    aliases: [oe]
-    description: Opens the enderchest of a player
-    permission: OpenInv.*;OpenInv.openender
-    usage: |-
-           /<command> [Player] - Open a player's enderchest
-  searchinv:
-    aliases: [si]
-    description: Search and list players having a specific item
-    permission: OpenInv.*;OpenInv.search
-    usage: |-
-           /<command> <Item> [MinAmount] - Item is the ID or the Bukkit Material, MinAmount is the minimum amount required
-  searchender:
-    aliases: [se]
-    permission: OpenInv.*;OpenInv.search
-    description: Searches and lists players having a specific item in their ender chest
-    usage: |-
-           /<command> <item> [MinAmount] - Item is the ID or the Bukkit Material, MinAmount is the minimum amount required
-  silentchest:
-    aliases: [sc, silent]
-    description: Toggle silent chest function, which stops sounds and animations when using containers.
-    permission: OpenInv.*;OpenInv.silent
-    usage: |-
-           /<command> [Check] - Check or toggle silent chest
-  anychest:
-    aliases: [ac]
-    description: Toggle anychest function, which allows opening of blocked chests.
-    permission: OpenInv.*;OpenInv.anychest
-    usage: |-
-           /<command> [Check] - Checks or toggle anychest
-  searchenchant:
-    aliases: [searchenchants]
-    description: Search and list players with a specific enchantment.
-    permission: OpenInv.*;OpenInv.searchenchant
-    usage: |-
-           /<command> <[enchantment] [MinLevel]> - Enchantment is the enchantment type, MinLevel is the minimum level. One is optional