Trac #16336: Update Cremona's table of elliptic curves to 350000

The new upstream tarball is at

​http://boxen.math.washington.edu/home/cremona/database_cremona_ellcurve
-20140512.tar.bz2

The new commit only changes the package-version.txt and checksums.ini
files.

URL: http://trac.sagemath.org/16336
Reported by: cremona
Ticket author(s): John Cremona
Reviewer(s): Jeroen Demeyer
changes necessary for the updated gap_packages tarball, which includes
GAP's AtlasRep package now - necessary to fix GAP's TomLib package,
but also useful on its own
Trac #16416: provide AtlasRep GAP package to fix TomLib

`AtlasRep` is needed for a functioning `TomLib` GAP package, which we do
provide, but which is broken due to this.

See http://permalink.gmane.org/gmane.comp.mathematics.sage.support/34446

The updated upstream tarball is here:
http://boxen.math.washington.edu/home/dima/packages/gap_packages-4.7.4.2
0140531.tar.bz2

NB: we do not attempt to make sure that the full functionality
(interaction with an online database via http, which needs either
another GAP package, IO, or `wget`) of `AtlasRep` is available (it
appears to work OK on Linux, but only partially on OSX which does nto
have `wget` installed). This is for another ticket.

URL: http://trac.sagemath.org/16416
Reported by: dimpase
Ticket author(s): Dmitrii Pasechnik
Reviewer(s): Volker Braun