Add flamethrower (#253)

* Add flamethrower

* Fix RSI

* Add GasAmmoProvider

* Add hidden crafting

* Remove DoubleSwordCraft

* Fix yml

Resources/Textures/White/Objects/Weapons/flamethrower.rsi/meta.json

@@ -0,0 +1,91 @@
+{
+  "version": 1,
+  "license": "CC-BY-SA-3.0",
+  "copyright": "Taken from tgstation at https://github.com/tgstation/tgstation at bf8d2971568ead3cca52bee775101fd2cc26d9a7",
+  "size": {
+    "x": 32,
+    "y": 32
+  },
+  "states": [
+    {
+      "name": "icon"
+    },
+    {
+      "name": "no-igniter"
+    },
+    {
+      "name": "tank"
+    },
+    {
+      "name": "flame",
+      "delays": [
+        [
+          0.2,
+          0.2,
+          0.2,
+          0.2
+        ]
+      ]
+    },
+    {
+      "name": "inhand-left",
+      "directions": 4
+    },
+    {
+      "name": "inhand-right",
+      "directions": 4
+    },
+    {
+      "name": "inhand-left-flame",
+      "directions": 4,
+      "delays": [
+        [
+          0.2,
+          0.2,
+          0.2
+        ],
+        [
+          0.2,
+          0.2,
+          0.2
+        ],
+        [
+          0.2,
+          0.2,
+          0.2
+        ],
+        [
+          0.2,
+          0.2,
+          0.2
+        ]
+      ]
+    },
+    {
+      "name": "inhand-right-flame",
+      "directions": 4,
+      "delays": [
+        [
+          0.2,
+          0.2,
+          0.2
+        ],
+        [
+          0.2,
+          0.2,
+          0.2
+        ],
+        [
+          0.2,
+          0.2,
+          0.2
+        ],
+        [
+          0.2,
+          0.2,
+          0.2
+        ]
+      ]
+    }
+  ]
+}