replace make install to checkinstall for linux installation
Update nTox.c

Added help command to nTox.c
Merge pull request #165 from nurupo/master

Fixed cmake
Merge pull request #166 from theshadowfog/patch-2

Update nTox.c
Merge branch 'patch-1' of https://github.com/dypa/ProjectTox-Core into dypa-patch-1

Conflicts:
	INSTALL.md
Added a note about libconfig