Recoded weapon restrictions, and made new way of storing data. (Arrays)

* Removed ZMarket as an external plugin (to be integrated next commit)
* Updated weapon configs, removed weapongroups.txt and moved weapons.txt to root zr config folder.
* Moved offset finding to respective module, made new forward *OnOffsetsFound.
* Updated weapons&hitgroups config file format to match playerclass.txt
* Updated translations.
* Recoded weapon restrict menu, commented out all zadmin options that don't quite work.
* Added weaponammo module (not finished but existent)
* Started zmarket module.

src/zr/weapons/zmarket.inc

@@ -0,0 +1,47 @@
+/*
+ * ============================================================================
+ *
+ *   Zombie:Reloaded
+ *
+ *   File:          
+ *   Type:          Module
+ *   Description:   
+ *
+ * ============================================================================
+ */
+
+/**
+ * Variable to store buyzone offset value.
+ */
+new g_iToolsInBuyZone;
+
+/**
+ * Initialize market data.
+ */
+ZMarketInit()
+{
+}
+
+/**
+ * Find ZMarket-specific offsets here.
+ */
+ZMarketOnOffsetsFound()
+{
+    // If offset "m_bInBuyZone" can't be found, then stop the plugin.
+    g_iToolsInBuyZone = FindSendPropInfo("CCSPlayer", "m_bInBuyZone");
+    if (g_iToolsInBuyZone == -1)
+    {
+        LogPrintToLog(LOG_FORMAT_TYPE_FATALERROR, "Tools", "Offsets", "Offset \"CCSPlayer::m_bInBuyZone\" was not found.");
+    }
+}
+
+/**
+ * Checks if a client is in a buyzone.
+ * 
+ * @param client    The client index.
+ */
+stock bool:ZMarketIsClientInBuyZone(client)
+{
+    // Return if client is in buyzone.
+    return bool:GetEntData(client, g_iToolsInBuyZone);
+}