this is 3.0.2.rc0, the likely final release of the 3.0.2 series and hopefully next to identical to the final 3.0.2. What is new?

- Franco Saliola and Peter Jipsen's posets and semi-lattive patch
- Robert Miller's self-orthogonal binary codes
- Bjarke Hammersholt Roune's Frobby is now an optional spkg
- Pbuild should now pass the doctests since #3097 has been fixed

Sources and a sage.math-only binary in the usual places:

Cheers,

Michael

Merged in rc0:

#1762: Robert Miller, Michael Abshoff: Create optional graphviz package

#2121: Robert Miller: move libecm wrapper from interfaces to libs

#2519: Franco Saliola, Peter Jipsen: Add support for posets, semi-lattices, etc. to Sage

#3018: Bjarke Hammersholt Roune: Integrate Frobby into Sage

#3097: Gary Furnish, Michael Abshoff: pbuild: make sure the files from setup.py's scripts section are copied

#3104: William Stein: pbori.pyx: Make some doctest long since it uses a lot of RAM

#3112: Robert Miller: Generate self-orthogonal binary codes

#3148: Francis Clarke: improved orthogonal functions

#3218: Michael Abshoff: fix 64 bit OSX build support for mercurial

#3219: William Stein: upgrade to gmp-4.2.2 while we wait for MPIR

#3242: Robert Miller: Fix little bug in G.relabel() for G a graph

#3245: Mike Hansen: provide coefficient and coefficients methods for symbolic expressions

#3257: Gary Furnish: Pbuild ignores gcc specific default settings

#3263: Craig Citro: typo in lseries_ell.py

#3266: William Stein: Sage 3.0.2.alpha1: doctest failure in sage/server/simple/twist.py

#3267: Michael Abshoff: Sage 3.0.2.alpha1: doctest failure in sage/server/support.py

#3269: Jason Bandlow: Improve documentation for combinat/dyck_word.py

#3270: Robert Miller: trivial 100x speedup in coding theory

#3272: Craig Citro: Bug in sparse polynomials over finite fields

#3273: Robert Bradshaw: extend isqrt to work for Python int's in addition to Sage integers and objects with an isqrt method

#3274: Michael Abshoff: OSX: delete libpng*.la since we also nuke libpng*.dylib

#3275: Craig Citro: Make SL2Z distinct

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