Switch to configure and make based build

Also removed excessive use of std.regex in esvapi.d and
made it actually compile -_-

Makefile

@@ -1,32 +0,0 @@
-IMPORT    = import
-PREFIX    = /usr/local
-MANPREFIX = /usr/share/man
-
-DC      = ldc2
-CFLAGS  = -O -I${IMPORT} -release -w
-OBJS    = main.o esvapi.o ini.o
-
-all: esv
-
-esv: ${OBJS}
-	${DC} ${CFLAGS} -of$@ ${OBJS}
-
-# main executable
-main.o: main.d esvapi.o
-	${DC} ${CFLAGS} -of$@ -c main.d
-
-esvapi.o: esvapi.d
-	${DC} ${CFLAGS} -of$@ -c esvapi.d
-
-ini.o: ${IMPORT}/dini/*.d
-	${DC} ${CFLAGS} -of$@ -c ${IMPORT}/dini/*.d
-
-clean:
-	rm -f esv ${OBJS}
-
-install: esv
-	install -m755 esv ${DESTDIR}${PREFIX}/bin/esv
-	cp -f esv.1 ${DESTDIR}${MANPREFIX}/man1
-	cp -f esv.conf.5 ${DESTDIR}${MANPREFIX}/man5
-
-.PHONY: all clean install