ToDo
There are usually a number of things to do for all spkgs, but none of them by
- ensure that "make install" is non-parallel, i.e. do a "export MAKE=make"
- SAGE_LOCAL check (#633)
- add spkg-check (#299)
- add proper SPKG.txt to all packages
- /usr/bin/env bash (#1638)
- add md5sums for spkgs (#329)
- set LDFLAGS on OSX (#3349)