build: add a basic Linux Makefile
build: .gitignore
main.c: stop gcc complaints
zwssock.c: remove unused variables
zwssock.c: return value in int function
zwshandshake.c: remove multichar constants
zwshandshake.c: type cast argument
zwshandshake.c: TRUE->true

gcc takes this; not sure about msc
zwsdecoder_destroy(): actually zero the reference
zwsdecoder.c: use statics for private methods
zwsdecoder.c: unhandled cases - might need attention
buidl/Makefile: warnings removed
Merge pull request #1 from mhaberler/linux-build-v0.1

Linux build v0.1