Support for less/equal/greater version in requires/conflicts, etc

Add less/equal/greater information to razor_property, and update
importers and other code.

Move the rpm importer from import.c to rpm.c to avoid code
duplication, and then rename import.c to yum.c since that's all that's
left.

CFLAGS = -Wall -g

LDLIBS = -lexpat -lz -g -lrpm -lcurl

all : razor test-driver

razor : razor.o import.o main.o rpm.o util.o

test-driver : razor.o util.o test-driver.o

test : test-driver

	./test-driver test.xml

clean :

	rm -f *.o razor