Implement HTTP server for HTML5 export
Implement HTTP server for HTML5 export

Since most browsers no longer allow making async requests from a page
loaded from `file://`, we now need a proper HTTP server to load the
exported HTML5 game.
This should also allow us to get the debugger to work over a WebSocket
connection.

ZuBsPaCe/godot,godotengine/godot,MarianoGnu/godot,ex/godot,guilhermefelipecgs/godot,DmitriySalnikov/godot,josempans/godot,Valentactive/godot,ZuBsPaCe/godot,josempans/godot,guilhermefelipecgs/godot,Shockblast/godot,MarianoGnu/godot,ex/godot,DmitriySalnikov/godot,firefly2442/godot,vnen/godot,Shockblast/godot,sanikoyes/godot,Zylann/godot,Valentactive/godot,Paulloz/godot,guilhermefelipecgs/godot,Shockblast/godot,DmitriySalnikov/godot,Zylann/godot,Zylann/godot,Zylann/godot,ZuBsPaCe/godot,MarianoGnu/godot,guilhermefelipecgs/godot,josempans/godot,honix/godot,MarianoGnu/godot,MarianoGnu/godot,ex/godot,akien-mga/godot,godotengine/godot,akien-mga/godot,Shockblast/godot,Valentactive/godot,guilhermefelipecgs/godot,BastiaanOlij/godot,vkbsb/godot,firefly2442/godot,ZuBsPaCe/godot,pkowal1982/godot,vkbsb/godot,sanikoyes/godot,vnen/godot,BastiaanOlij/godot,ex/godot,Faless/godot,honix/godot,pkowal1982/godot,godotengine/godot,sanikoyes/godot,Zylann/godot,vnen/godot,ex/godot,godotengine/godot,ZuBsPaCe/godot,MarianoGnu/godot,Paulloz/godot,honix/godot,honix/godot,sanikoyes/godot,josempans/godot,akien-mga/godot,firefly2442/godot,Faless/godot,josempans/godot,akien-mga/godot,sanikoyes/godot,vnen/godot,BastiaanOlij/godot,josempans/godot,vnen/godot,ZuBsPaCe/godot,Zylann/godot,Shockblast/godot,DmitriySalnikov/godot,godotengine/godot,sanikoyes/godot,vkbsb/godot,vnen/godot,Faless/godot,pkowal1982/godot,ex/godot,Valentactive/godot,MarianoGnu/godot,Shockblast/godot,godotengine/godot,guilhermefelipecgs/godot,BastiaanOlij/godot,ex/godot,firefly2442/godot,BastiaanOlij/godot,vkbsb/godot,vkbsb/godot,vkbsb/godot,honix/godot,Faless/godot,akien-mga/godot,pkowal1982/godot,MarianoGnu/godot,Faless/godot,vkbsb/godot,Paulloz/godot,Shockblast/godot,josempans/godot,vnen/godot,pkowal1982/godot,Valentactive/godot,Shockblast/godot,josempans/godot,Faless/godot,Faless/godot,pkowal1982/godot,Valentactive/godot,ZuBsPaCe/godot,DmitriySalnikov/godot,ex/godot,DmitriySalnikov/godot,godotengine/godot,godotengine/godot,ZuBsPaCe/godot,BastiaanOlij/godot,sanikoyes/godot,vkbsb/godot,akien-mga/godot,honix/godot,guilhermefelipecgs/godot,guilhermefelipecgs/godot,firefly2442/godot,Valentactive/godot,akien-mga/godot,firefly2442/godot,Zylann/godot,sanikoyes/godot,vnen/godot,BastiaanOlij/godot,akien-mga/godot,pkowal1982/godot,firefly2442/godot,Paulloz/godot,firefly2442/godot,pkowal1982/godot,Faless/godot,BastiaanOlij/godot,Paulloz/godot,Paulloz/godot,Valentactive/godot,DmitriySalnikov/godot,Paulloz/godot,Zylann/godot