gif + io updated
O update, but only works with small images
Merge branch 'master' of https://github.com/Otrin/GIF-LZW

Conflicts:
	src/lzw/gif.cpp
	src/lzw/io.cpp
new compressor-folder
methods in compressor class
char->unsigned char
fixing posPixel
few fixes
nextStep()-method in LZW
merge IO->IO local
Merge branch 'IO' of https://github.com/Otrin/GIF-LZW.git into IO

Conflicts:
	src/lzw/lzw.cpp
fixes for frame and gif copy
Merge branch 'IO'
fix in gif copy ctor and assignment op
Merge branch 'IO'