gif + io updated
- Added functionality to load raw Data Files
- Added enum "Mode" containing "GIF, PICTURE, RAW" to set the Programm
to different Modes
- Configured the GUI for the different Modes
- deleted the functionality to swap tabs via 'ctrl+space' (swapped to
greyed out tabs -> to much work to fix. Swapping via 'ctrl + left /
right works')
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
Made RawData 'unsigned char' -> Needs testing, but seems OK at first
glance
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'
started development for new class to convert color tables
implemented median cut algo and first steps in table conversion
added method to apply a reduced color table to the frames of a gif