Add Makefile for building the project instead of building guide

[deathbeam]

Instead of having building instructions in README, add Makefile that does everything for us. Also adds LuaCURL as submodule as it is very useful to just have it like that.

Signed-off-by: Tomas Slusny [email protected]

[marnux]

I tried this and it worked well.

git clone --recurse-submodules --branch makefile https://github.com/deathbeam/pobfrontend.git
cd <cloned_frontend_dir>
git clone https://github.com/Openarl/PathOfBuilding.git
make
./pobfrontend

It makes building a lot easier.