Huge commit (Block API, changed events)

Changed Session to Player
Block API
Block Data

classes/Data.class.php

@@ -0,0 +1,143 @@
+<?php
+
+/*
+
+           -
+         /   \
+      /         \
+   /   PocketMine  \
+/          MP         \
+|\     @shoghicp     /|
+|.   \           /   .|
+| ..     \   /     .. |
+|    ..    |    ..    |
+|       .. | ..       |
+\          |          /
+   \       |       /
+      \    |    /
+         \ | /
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+
+*/
+
+class Material{
+	static $replaceable = array(
+		0 => true,
+		8 => true,
+		9 => true,
+		10 => true,
+		11 => true,
+		31 => true,
+		51 => true,
+		78 => true,	
+	);
+	static $activable = array(
+		2 => true,
+		3 => true,
+		6 => true,
+		26 => true,
+		31 => true,
+		46 => true,
+		51 => true,
+		54 => true,
+		58 => true,
+		61 => true,
+		62 => true,
+		64 => true,
+		73 => true,
+		78 => true,
+		96 => true,
+		107 => true,
+		247 => true,
+	);
+	static $placeable = array(
+		1 => true,
+		2 => true,
+		3 => true,
+		4 => true,
+		5 => true,
+		6 => true,
+		//7 => true,
+		8 => true,
+		9 => true,
+		10 => true,
+		11 => true,
+		12 => true,
+		13 => true,
+		14 => true,
+		15 => true,
+		16 => true,
+		17 => true,
+		18 => true,
+		19 => true,
+		20 => true,
+		21 => true,
+		22 => true,
+		24 => true,
+		355 => 26,
+		30 => true,
+		35 => true,
+		37 => true,
+		38 => true,
+		39 => true,
+		40 => true,
+		41 => true,
+		42 => true,
+		43 => true,
+		44 => true,
+		45 => true,
+		46 => true,
+		47 => true,
+		48 => true,
+		49 => true,
+		50 => true,
+		53 => true,
+		54 => true,
+		59 => true,
+		57 => true,
+		58 => true,
+		295 => 59,
+		61 => true,
+		324 => 64,
+		65 => true,
+		67 => true,
+		73 => true,
+		79 => true,
+		80 => true,
+		81 => true,
+		82 => true,
+		83 => true,
+		85 => true,
+		86 => true,
+		87 => true,
+		88 => true,
+		89 => true,
+		91 => true,
+		96 => true,
+		98 => true,
+		102 => true,
+		103 => true,
+		362 => 105,
+		107 => true,
+		108 => true,
+		246 => true,
+		247 => true,
+	);
+	static $blocks = array(
+		0 => "Air",
+		1 => "Stone",
+		2 => "Grass",
+		3 => "Dirt",
+		4 => "Cobblestone",
+		5 => "Wooden Planks",
+		6 => "Sapling",
+		7 => "Bedrock",	
+	);
+
+
+}