Squashed commit: @ryanmt's #141 and some changes by @mohawkjohn:
* fixes to LAPACK code (ryanmt)
* merge #140, so NMatrix installs on Fedora 19 (x86_64), which has
  /usr/lib64/atlas directory (linking issue) (dmchk)
* made the gesvd and gesdd non-destructive (ryanmt)
* fixed the gesvd convenience method, still looking for good complex
  spec (ryanmt)
* removed the old gesvd accessor (ryanmt)
* "column shifted version is shown to be broken" (ryanmt)
* "working on patching up the output to match" (ryanmt)
* cleaned up and fixed the shortcut for SVD, with specs (ryanmt)
Added license to gemspec
Merge branch 'master' of github.com:SciRuby/nmatrix