Node 0.8

Closes #89.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
erlang R15

Closes #85.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
gcc47: Adding cloog and isl

- cloog and isl are loop optimization support libs
- For the head: added --disable-werror because
  making warnings to errors is only recommended
  for devs of gcc.
gcc48: New formula GCC 4.8 release candidate.

* Head track branches/gcc-4_8-branch.
gcc47: Cloog/isl incompatible. Reverts e91d97a.

Homebrew updated cloog to the isl-based version but gcc 4.7
seems to need the PPL-based version.
Sorry, no graphite-loop-optimizations. Go for gcc48.
gcc45: 4.5.4
eigen2: Version 2 of eigen

Require for krita and possibly others.
Closes #8.
imagemagick-ruby186: Need old libpng. X11 optional

Simplify formula by removing now unused support methods.
Using `build.with?`.

Fixes #63 by adding optional `depends_on :x11`.
Fixes #10 by depending on old libpng12
erlang-r15: fix checksum
erlang-r15: Fix Xcode-only build: dtrace off.

- Backport of the fix to disable dtrace on
  Xcode-only Macs.
erlang r16
jpeg 9

Closes #91.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>