fastx_toolkit: Fix the build on Mountain Lion

clang build fails on Mountain Lion, but works on Mavericks.

Closes #620
Armadillo: update to 4.100.2

Closes #738.
biopieces 2291: New formula

The Biopieces are a collection of bioinformatics tools that can be
pieced together in a very easy and flexible manner to perform both
simple and complex tasks.
opencv: make Java bindings optional

Prevents forcing the :ant dependency on users without Java installed
and disables Java bindings by default.
bowtie: bump fails_with :clang version
bedtools 2.19.1

Closes #742.
Suite Sparse: refactor formula.

Several make variables are defined multiple times in
SuiteSparse_config_Mac.mk and sometimes with leading blanks. This caused
change_make_var to only change some of them and led to a bug where
SuiteSparse uses Accelerate even if the user selects OpenBLAS.

This update removes change_make_var entirely. See also:
https://github.com/Homebrew/homebrew/pull/27483
opencv: make eigen dep recommended

Closes #745.
Suite Sparse: remove escaped quotes.
Mumps: refactor formula.

This update removes change_make_var entirely. See also:
https://github.com/Homebrew/homebrew/pull/27483
Xmgredit: remove change_make_var
Voro++: remove change_make_var.
Velvet: remove change_make_var
Trnascan: remove change_make_var
Scotch5: remove change_make_var
Scotch: remove change_make_var
igvtools 2.3.31 (new formula)

Closes #746.
maxima: Fix test command by removing `'`

maxima was receiving the command `'run_testsuite(); quit();'`,
which just delayed the execution of the function

Closes #747.
gaemr 1.0.1: New formula

Genome Assembly Evaluation Metrics and Reporting (GAEMR):
a comprehensive package for assembly analysis
gmap-gsnap 2014-02-28