Added lua and SQL, but removed lsqlite3.c

lsqlite3.c looked like a good idea for connnecting SQL and lua, but I
couldn't get it to work and rather than struggle on this, I'll write my
own library later on.

server/makefile

@@ -3,7 +3,7 @@ COMMONDIR+=../common
 COMMON+=../libcommon.a
 LIB+=$(COMMON) -lmingw32 -lSDLmain -lSDL -llua -lsqlite3
 CXXFLAGS+=-std=c++11 -DDEBUG $(addprefix -I,$(COMMONDIR))
-CFLAGS+=-DDEBUG -I$(COMMONDIR)
+CFLAGS+=-DDEBUG $(addprefix -I,$(COMMONDIR))
 
 #source
 CXXSRC=$(wildcard *.cpp)