Wrote more instructions for Linux
Merge pull request #3 from Umeaboy/patch-2

Wrote more instructions for Linux
Merge branch 'master' of https://github.com/smx-smx/epk2extract into smx-smx-master

Conflicts:
	README.md

	modified:   README.md
	modified:   build.sh
	new file:   include/jffs2/jffs2.h
	new file:   include/jffs2/mini_inflate.h
	modified:   src/CMakeLists.txt
	modified:   src/epk.c
	new file:   src/jffs2/CMakeLists.txt
	new file:   src/jffs2/crc32.cpp
	new file:   src/jffs2/jffs2extract.cpp
	new file:   src/jffs2/mini_inflate.cpp
	modified:   src/main.c
	modified:   src/partinfo.c
	modified:   src/util.c
	added cygwin dlls to copy list:   build.sh
	bumped ver to 3.5:   src/main.c
	added deps for cygwin32:   build.sh
Removed unneded externs