New formula: obit

First version that installs basic Obit from svn, including the Python stuff. It builds the main Obit library as a dylib and does various other tweaks for the configure process on OS X.
obit: Removed cvsignores and added shared data
obit: Prepare for ObitTalk and ObitView

This prepares for installing the rest of Obit by checking out the repository one directory higher at the ObitSystem level. The install routine changes into Obit directory at the start and the patches are updated accordingly.
obit: incorporated ObitTalk

This installs ObitTalk as part of Obit. The Python bits go to the usual Homebrew site-packages while the docs and bins are also installed.
obit: incorporated ObitView

Now includes ObitView, which depends on X11.
obit: Fix installation of ObitTalk

Ensure the proper prefix for all configures and make installs, and avoid making directories in ObitTalk/python module.
obit: Added TDF files

These Task Definition Files define the interface to the Obit tasks started via ObitTalk. Also fixed paths to these files in the script.
obit: Added debug symbols

Now create and install debug symbols for libObit to improve debugging. Also removed commented-out dependencies to appease brew audit.
obit: Use userpaths to build docs with MacTeX
obit: Added patch to fix bus error

This patch avoids the use of a negative index (-1) into the record buffer which causes a bus error on Mac OS X (but not when running via gdb...).
obit: Fix SVN revision number extraction

The Obit library reports the SVN revision number at the start of each
task, which is useful for debugging. This pretty much serves as the
version number of the package. The Homebrew version is kept as HEAD,
however, as Homebrew does not like versioned HEADs (see e.g. PR
https://github.com/mxcl/homebrew/pull/9442).

Since the source tree is exported from the cached repository during
staging, the commit history and revision information are lost. The
solution is a custom download strategy that captures the revision
number before staging and bakes it into ObitVersion.c using the
package-provided getVersion.py so that it ends up in the source
tarball.