Replace music with free ones (fixes #301)

music/game/Mysterious Hallway.ogg.txt

@@ -1,5 +0,0 @@
-Mysterious Hallway
-https://soundcloud.com/user9072307/mysterious-hallway
-by SteelRebellion
-https://soundcloud.com/user9072307
-http://creativecommons.org/licenses/by-nc-nd/3.0/

music/game/molrevenge.mod.txt

@@ -1 +0,0 @@
-http://creativecommons.org/licenses/by-nc-sa/3.0/

music/game/rage.mod.txt

@@ -1 +0,0 @@
-http://creativecommons.org/licenses/by-nc-sa/3.0/

music/game/red_doors2.txt

@@ -0,0 +1,6 @@
+Red Doors v2.0
+Matthew Pablo
+http://www.matthewpablo.com
+http://opengameart.org/content/red-doors-v20
+
+http://creativecommons.org/licenses/by/3.0/

music/game/space_dimensions_8bit.txt

@@ -0,0 +1,6 @@
+Space Dimensions (8bit/Retro Version)
+Matthew Pablo
+http://www.matthewpablo.com
+http://opengameart.org/content/space-dimensions-8bitretro-version
+
+http://creativecommons.org/licenses/by/3.0/

music/menu/The promise.ogg.txt

@@ -1,4 +0,0 @@
-Reencoded from The promise by SteelRebellion
-https://soundcloud.com/user9072307/the-promise
-
-http://creativecommons.org/licenses/by-nc-sa/3.0/

music/menu/metamorphosis2.txt

@@ -0,0 +1,4 @@
+Reencoded from Metamorphosis ver. 2 by VocalMix
+http://opengameart.org/content/metamorphosis-ver-2
+
+http://opengameart.org/content/oga-by-30-faq