Notes on how to package a new version of eclib for Sage

After making a new eclib release VERSION:

1. make dist-bzip2
   This creates the file eclib-<VERSION>.tar.bz2
   Copy it to ~/sage/upstream

2. In ~/sage, checkout the development branch, update it from github and
   run "make".

3. Make a new sage branch, say
   git checkout -b eclib-<VERSION>

4. In ~/sage/build/pkgs/eclib, update the version number in
   package-version.txt and spkg-configure.m4

5. Run (using this sage)
   sage --package fix-checksum eclib

6. Build this new eclib in sage, with checks:
   sage -i -c eclib

   [Doing 'make eclib' is also OK, but does not run eclib's checks.]

7. Test sage to see if any doctests need changing.  Start with:
   sage -t --long src/sage/libs/eclib
   sage -t --long src/sage/schemes/elliptic_curves

8. Make a github release and upload eclib-<VERSION>.tar.bz2 to it.

9. Commit the changes to sage, upload the branch to github and create
   a Pull Request.