Update LICENSE.txt

Fixed an oops
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
Fixed typo in docs
Fixed API problem, restoring rb-gsl compatibility
Version bump
Removed some unnecessary code in dense. Includes debugging comments.
Trying to debug a memory error, also added a set intersection function
for Yale (experimental)
Finally got to the bottom of memory error.
  * Fixed double-free problem (by @cjfuller)

  * Fixed contiguous array marking fencepost error

  * Fixed C/C++ API compatibility problem preventing rb/gsl linking

  * Resolved a number of compiler warnings, including one return-type
    problem that would likely have become a garbage collection error
    (if it wasn't already)

  * Fixed -O3 optimization

  * Added experimental #yale_row_key_intersection function for expert
    recommendation problems
Fixed another double-free problem, this time for Yale default array
assignment (matrix constructor)
Replaced nm_register_values and nm_unregister_values with volatile VALUE
declarations in two places. This seems to work. #139
Trying to satisfy Travis-CI.
Bug fix to Yale intersection experimental function; restored nrm2 and
asum.
Update GC-related comments in dense_map and dense_map_pair

This removes the nm_register_values and nm_unregister_values calls completely
and adds a note for future reference about what the volatile is doing there.
Trying out forcing Travis to use GCC 4.7
Added range checking to #yale_nd_row
Merge pull request #145 from cjfuller/volatile_doc

Update GC-related comments in dense_map and dense_map_pair