Added libpngdec example with on build libpng to load PNG from memory or files (correction)
Added libpngdec example with on build libpng to load PNG from memory or files (correction)

HACKERCHANNEL/PSL1GHT,hank/PSL1GHT,ps3dev/PSL1GHT,hank/PSL1GHT,HACKERCHANNEL/PSL1GHT,andoma/PSL1GHT,ps3dev/PSL1GHT,ps3dev/PSL1GHT,andoma/PSL1GHT,ps3dev/PSL1GHT,HACKERCHANNEL/PSL1GHT