Create icons/textures

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Create icons/texutres for the following:
* Tank (without the cannon part, since that will be different)
* Arrow (one direction needed, we can rotate for whichever direction we need)
* Background (mainly just sky/clouds, since terrain is generated)
* Weapon icons and shot texture

Remember that these textures need to fit well on the screen, so don't make the 
tanks too big, for example. The size should be a power of two (e.g. 8x8 or 
16x32). PNG format is preferred, with a transparent background.

Original issue reported on code.google.com by jerr0328 on 2 Apr 2012 at 5:12

• Blocking: #3

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Original comment by jerr0328 on 3 Apr 2012 at 5:25

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Color can be added in the code (i.e. tank texture can be grayscale, the code 
will color it in), so keep the tank in grayscale.

Original comment by jerr0328 on 3 Apr 2012 at 6:23

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And a game icon

Original comment by jerr0328 on 4 Apr 2012 at 12:56

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Original comment by jerr0328 on 4 Apr 2012 at 12:57

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Original comment by jerr0328 on 4 Apr 2012 at 9:16

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Original comment by jerr0328 on 18 Apr 2012 at 6:14

• Changed state: Fixed

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Original comment by jerr0328 on 29 Apr 2012 at 1:13

• Changed state: Done