Updated the version number

Holy shit i can't write for shit(referring to previous commit on this file)

ReadMe.txt

@@ -3,7 +3,7 @@
   ==  aka Peder Bergebakken Sundt  ==  
 
 --VERSIONS--
-PPM.py:         v1.2
+PPM.py:         v1.3
 PPM_nonumpy.py: v1.06
 UGO.py:         v0.93
 NTFT.py:        v0.80
@@ -11,7 +11,7 @@ NTFT.py:        v0.80
 --DESCRIPTION--
 PPM.py can read the metadata, thumbnail, frames and the sound of Flipnote Studio files: .ppm
 It can also handle .tmb files.
-If you don't have numpy, you can use the non numpy version PPM_nonumpy.py
+If you don't have numpy, you can use the old non-numpy version PPM_nonumpy.py. This one doesn't support sound conversion
 
 UGO.py can read and write UGO files, and modify their content. It can also convert UGO files
 to and from the XML format
@@ -36,3 +36,4 @@ See License.txt
 -Steven for most of the documentation on DSiBrew and his frame decoding example on his talkpage
 -Remark for helping me understanding the 8x8 tiling on the preview images.
 -JSAfive for supplying .tmb and .ugo files
+-Austin Burk, Midmad on hatena haiku and WDLmaster on hcs64.com for determining the sound codec