bump scipy to 0.13.3
Add Julia package

This version uses Hashdist's LLVM, otherwise builds everything else itself.
Reuse our openblas, FFTW, GMP and MPFR
Use our PCRE
Copy the libraries over to avoid issues with rpath
Add Arb library
Add the flint package
Add Flint as a dependency to Arb
Arb: fix the rpaths in the .so library
Flint: fix the rpaths in the .so library
Merge pull request #232 from hashdist/arb

Add Arb and Flint packages
Add the gprof2dot package
Add libunwind
Add oprofile
Remove the empty line
Merge pull request #233 from hashdist/gprof

Add the gprof2dot package
Explicitly build all CMake based packages with FPIC support enabled.

By enabling FPIC this way we handle compilers like XLC which use non
standard flags to enable FPICiness.
Merge pull request #236 from robertmaynard/cmake_fpic_support

Explicitly build all CMake based packages with FPIC support enabled.
ENH: autotools/configure handling w/ env append

Add the ability to append to environment variables in the configure
stage.  This is especially important if the user needs to adjust CPFLAGS
or LDFLAGS, which would normally be overridden if specified in the
configure line.

This also adds two in-hashstack test packages.  These should eventually
be moved into a different directory, perhaps test/pkgs.
Merge pull request #237 from hashdist/ahmadia/improve_autotools

ENH: autotools/configure handling w/ env append