main: Add --version switch and git hash to --help
main: Add --version switch and git hash to --help

Also fix some help strings.

Paulloz/godot,Faless/godot,Faless/godot,Shockblast/godot,Brickcaster/godot,pkowal1982/godot,firefly2442/godot,NateWardawg/godot,vnen/godot,guilhermefelipecgs/godot,DmitriySalnikov/godot,ex/godot,Valentactive/godot,MarianoGnu/godot,ageazrael/godot,Faless/godot,ex/godot,Zylann/godot,vkbsb/godot,ZuBsPaCe/godot,vnen/godot,RandomShaper/godot,Valentactive/godot,Paulloz/godot,RandomShaper/godot,vkbsb/godot,godotengine/godot,okamstudio/godot,Brickcaster/godot,ZuBsPaCe/godot,MarianoGnu/godot,Brickcaster/godot,vkbsb/godot,vnen/godot,ex/godot,josempans/godot,Shockblast/godot,Zylann/godot,ZuBsPaCe/godot,honix/godot,RandomShaper/godot,josempans/godot,Zylann/godot,guilhermefelipecgs/godot,Paulloz/godot,okamstudio/godot,firefly2442/godot,n-pigeon/godot,jejung/godot,MarianoGnu/godot,RandomShaper/godot,guilhermefelipecgs/godot,honix/godot,RandomShaper/godot,FateAce/godot,pkowal1982/godot,FateAce/godot,n-pigeon/godot,Valentactive/godot,zicklag/godot,Paulloz/godot,akien-mga/godot,godotengine/godot,okamstudio/godot,ZuBsPaCe/godot,zicklag/godot,josempans/godot,ageazrael/godot,honix/godot,sanikoyes/godot,josempans/godot,josempans/godot,mcanders/godot,NateWardawg/godot,groud/godot,BastiaanOlij/godot,ex/godot,ZuBsPaCe/godot,NateWardawg/godot,pkowal1982/godot,godotengine/godot,firefly2442/godot,Brickcaster/godot,honix/godot,honix/godot,akien-mga/godot,vnen/godot,akien-mga/godot,DmitriySalnikov/godot,MarianoGnu/godot,josempans/godot,pkowal1982/godot,Valentactive/godot,okamstudio/godot,godotengine/godot,Zylann/godot,sanikoyes/godot,BastiaanOlij/godot,groud/godot,DmitriySalnikov/godot,godotengine/godot,NateWardawg/godot,pkowal1982/godot,zicklag/godot,ageazrael/godot,vkbsb/godot,sanikoyes/godot,vnen/godot,vkbsb/godot,Shockblast/godot,sanikoyes/godot,n-pigeon/godot,Faless/godot,Valentactive/godot,Valentactive/godot,Shockblast/godot,NateWardawg/godot,vkbsb/godot,Faless/godot,okamstudio/godot,n-pigeon/godot,ageazrael/godot,Shockblast/godot,akien-mga/godot,n-pigeon/godot,pkowal1982/godot,DmitriySalnikov/godot,guilhermefelipecgs/godot,guilhermefelipecgs/godot,NateWardawg/godot,vkbsb/godot,vnen/godot,Zylann/godot,FateAce/godot,ZuBsPaCe/godot,josempans/godot,RandomShaper/godot,Paulloz/godot,jejung/godot,mcanders/godot,FateAce/godot,firefly2442/godot,ageazrael/godot,ZuBsPaCe/godot,okamstudio/godot,honix/godot,akien-mga/godot,NateWardawg/godot,mcanders/godot,sanikoyes/godot,guilhermefelipecgs/godot,Brickcaster/godot,sanikoyes/godot,jejung/godot,zicklag/godot,sanikoyes/godot,vkbsb/godot,Zylann/godot,firefly2442/godot,BastiaanOlij/godot,DmitriySalnikov/godot,godotengine/godot,BastiaanOlij/godot,Faless/godot,MarianoGnu/godot,Zylann/godot,pkowal1982/godot,ex/godot,godotengine/godot,pkowal1982/godot,Faless/godot,ageazrael/godot,Valentactive/godot,mcanders/godot,ageazrael/godot,FateAce/godot,groud/godot,NateWardawg/godot,firefly2442/godot,Paulloz/godot,groud/godot,Zylann/godot,groud/godot,okamstudio/godot,okamstudio/godot,guilhermefelipecgs/godot,groud/godot,Shockblast/godot,guilhermefelipecgs/godot,MarianoGnu/godot,BastiaanOlij/godot,Shockblast/godot,jejung/godot,sanikoyes/godot,zicklag/godot,Brickcaster/godot,n-pigeon/godot,FateAce/godot,zicklag/godot,MarianoGnu/godot,jejung/godot,okamstudio/godot,NateWardawg/godot,DmitriySalnikov/godot,Brickcaster/godot,ex/godot,ex/godot,firefly2442/godot,DmitriySalnikov/godot,okamstudio/godot,Valentactive/godot,BastiaanOlij/godot,mcanders/godot,RandomShaper/godot,akien-mga/godot,godotengine/godot,firefly2442/godot,MarianoGnu/godot,BastiaanOlij/godot,josempans/godot,vnen/godot,akien-mga/godot,Paulloz/godot,akien-mga/godot,ZuBsPaCe/godot,mcanders/godot,Faless/godot,n-pigeon/godot,Shockblast/godot,vnen/godot,jejung/godot,ex/godot,BastiaanOlij/godot