Compiler support now uses configuration files.

- no more need for compiler python files.

- Default compilers are found in user's environment and added
	to ~/.spackconfig automatically

- User can add new compilers by editing configuration file

var/spack/compilers/clang@3.3.py

@@ -1,4 +0,0 @@
-cc  = '/usr/bin/clang'
-cxx = '/usr/bin/clang++'
-f77 = 'gfortran'
-fc  = 'gfortran'

var/spack/compilers/gcc@4.5.4.py

@@ -1,4 +0,0 @@
-cc  = '/Users/gamblin2/macports/bin/gcc-mp-4.5'
-cxx = '/Users/gamblin2/macports/bin/g++-mp-4.5'
-f77 = '/Users/gamblin2/macports/bin/gfortran-mp-4.5'
-fc  = '/Users/gamblin2/macports/bin/gfortran-mp-4.5'

var/spack/compilers/gcc@4.7.3.py

@@ -1,4 +0,0 @@
-cc  = '/Users/gamblin2/macports/bin/gcc-mp-4.7'
-cxx = '/Users/gamblin2/macports/bin/g++-mp-4.7'
-f77 = '/Users/gamblin2/macports/bin/gfortran-mp-4.7'
-fc  = '/Users/gamblin2/macports/bin/gfortran-mp-4.7'

var/spack/compilers/gcc@4.8.1.py

@@ -1,4 +0,0 @@
-cc  = '/Users/gamblin2/macports/bin/gcc-mp-4.8'
-cxx = '/Users/gamblin2/macports/bin/g++-mp-4.8'
-f77 = '/Users/gamblin2/macports/bin/gfortran-mp-4.8'
-fc  = '/Users/gamblin2/macports/bin/gfortran-mp-4.8'