Add paramter to build slurm for Debian

* This let slurm search in /usr/share/slurm for its themes.
Add .tavis.yml to use travis-ci.org
Support for Darwin (Mac OS X)
SConstruct Update

Mistakenly deleted the parameter from the SConstruct to build slurm for Debian.
Slurm formula for Homebrew
Fixed potential broken links in Homebrew formula

Updated sha1 and url parameters in formula.
Merge pull request #2 from return/upstream

Slurm SConstruct colour support for Darwin (OS X)
Revert "Slurm SConstruct colour support for Darwin (OS X)"
Merge pull request #3 from mattthias/revert-2-upstream

Revert "Slurm SConstruct colour support for Darwin (OS X)"
Add support for MacOS. Thanks to return <mr_j.c.h@hotmail.com>!
Import compiler/linker flags from environment
Merge tag 'upstream/0.4.1'
Bump Standards-Version to 3.9.5 / depend on debhelper 9
Let slurm search in /usr/share/slurm for themes

* If __Debian__ is defined slurm searchs in /usr/share/slurm for themes.
Document changes for 0.4.1-1