gmake-ify these things.
Add a very basic wrapper makefile.

It doesn't run configure in libev yet; that has to be done.
Add subdirectory targeting Makefiles with the relevant dumb hackery to get
this stuff to build.

Add 'default' and 'all' targets as appropriate.

Now this stuff builds by 'make clean config all'

Next up, an install target and some unified includes so things like
destination directory and CFLAGS stuff can be configured at build
time.