Adding gdb_backtrace() function.
GCC warned about ignoring the return code for the system call, so
let's not ignore it.
Reorganize helper functions into anonymous namespace.

Even if your compiler doesn't support the C++ ABI demangling stuff or
GLIBC backtrace(), we can try to get a gdb backtrace.
Update traffic.
Turn on monthly plots.
Merge pull request #344 from libMesh/gdb_backtrace

GDB backtrace
Added meshavg app

Using the BASIC_SYSTEM trick saves me a few dozen gigabytes of memory.
Ran bootstrap
Merge pull request #347 from libMesh/meshavg_fixup

Meshavg (PR fixup from @jwpeterson)
Update traffic.
Fixing invalid equality comparison between ostreams.

This equality comparison fails on the version of clang++ that comes
with Mavericks, Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM
3.4svn), when compiled with -std=c++0x/c++11.  I'm not sure if it's
*ever* been legal C++ code, but no compiler has complained about it
until now.
Fix signed/unsigned comparison warning in new meshavg code.
Update traffic.
Make the script that generates the Makefile.am files use "ln -s -f".

See also 64194159aecac1177eb615520a64a0eabf6c568d.
Add initial support for Gauss-Lobatto quadrature.

Refs #350.
Updating Makefile.am's
Ran bootstrap.
Add unit test for Gauss-Lobatto quadrature.
Add an enum-to-string conversion for QGAUSS_LOBATTO.
Add unit test for enum_to_string conversion for QuadratureTypes.