New music added to missions [#1]

Will be lots of commits like that in the future, this is the first. Just
wait for new soundtracks ;)

levels/scene303/scene.txt

@@ -1,3 +1,4 @@
+MissionFile version=2
 Title.E text="On the Offensive"
 Resume.E text="Develop an offensive weapons system and confront the giant ants."
 Instructions name="mhtropi3.txt"
@@ -7,7 +8,7 @@ SoluceFile   name="mstropi3.txt"
 HelpFile     name="cbot.txt"
 EndingFile   win=-1 lost=0
 
-Audio         track=3
+AudioChange   filename="Constructive.ogg" type=WingedShooter powermin=0.8 repeat=0 
 AmbientColor  air=0.596;0.596;0.400;0.400 water=0.078;0.078;0.078;0.078  // grey
 FogColor      air=0.843;0.937;0.796;0.000 water=0.267;0.392;0.314;0.000  // bleu sale
 VehicleColor  color=0.553;0.686;0.506;0.000  // vert-sable

levels/scene502/scene.txt

@@ -1,3 +1,4 @@
+MissionFile version=2
 Title.E text="Invasion"
 Resume.E text="Hold out against a giant ant invasion."
 Instructions name="mhsaari2.txt"
@@ -7,7 +8,7 @@ SoluceFile   name="mssaari2.txt"
 HelpFile     name="cbot.txt"
 EndingFile   win=-1 lost=0
 
-Audio         track=5
+Audio         filename="Quite.ogg"
 AmbientColor  air=0.533;0.533;0.400;0.400 water=0.078;0.078;0.078;0.078  // grey
 FogColor      air=0.996;0.961;0.573;0.000 water=0.263;0.314;0.392;0.000  // yellow
 VehicleColor  color=0.620;0.561;0.267;0.000  // sable

levels/scene704/scene.txt

@@ -1,3 +1,4 @@
+MissionFile version=2
 Title.E text="New Policies"
 Resume.E text="Try a more humane method of dealing with insects."
 Instructions name="mhcent4.txt"
@@ -7,7 +8,7 @@ SoluceFile   name="mscent4.txt"
 HelpFile     name="cbot.txt"
 EndingFile   win=704 lost=0
 
-Audio         track=7
+AudioChange   filename="Hv2.ogg" pos=0;0 dist=25000 type=Converter min=1 repeat=0
 AmbientColor  air=0.400;0.400;0.400;0.400 water=0.078;0.078;0.078;0.078  // grey
 FogColor      air=0.690;0.690;0.710;0.000 water=0.039;0.392;0.078;0.000  // grey
 VehicleColor  color=0.459;0.620;0.251;0.000  // vert

levels/scene801/scene.txt

@@ -1,3 +1,4 @@
+MissionFile version=2
 Title.E text="Logistics"
 Resume.E text="Lay the foundations for a relay station and a refueling station."
 Instructions name="mhorph1.txt"
@@ -7,7 +8,7 @@ SoluceFile   name="msorph1.txt"
 HelpFile     name="cbot.txt"
 EndingFile   win=-1 lost=0
 
-Audio         track=8
+Audio         filename="Infinite.ogg" repeat=0
 AmbientColor  air=0.400;0.267;0.267;0.400 water=0.078;0.078;0.078;0.078  // grey
 FogColor      air=0.196;0.118;0.039;0.000 water=0.263;0.314;0.392;0.000  // braun-orange
 VehicleColor  color=0.620;0.471;0.322;0.000  // ocre

levels/scene903/scene.txt

@@ -1,3 +1,4 @@
+MissionFile version=2
 Title.E text="Gold Digger"
 Resume.E text="Be prepared to dig for buried treasure."
 Instructions name="mhterra3.txt"
@@ -7,7 +8,7 @@ SoluceFile   name="msterra3.txt"
 HelpFile     name="cbot.txt"
 EndingFile   win=-1 lost=0
 
-Audio         track=9
+Audio         filename="Prototype.ogg" repeat=0
 AmbientColor  air=0.400;0.400;0.400;0.400 water=0.078;0.078;0.078;0.078  // grey
 FogColor      air=0.816;0.784;0.875;0.000 water=0.369;0.600;0.706;0.000  // magenta
 VehicleColor  color=0.784;0.769;0.682;0.000  // sable