Remove pry and rspec-longrun from Gemfile.

These are already listed in the gemspec as development dependencies and pulled into the Gemfile from there.

This stops a bundler warning about gems listed more than once.
README - Minor typo correciton

* Correct gem package
Merge pull request #198 from cjfuller/fix_double_pry_dep

Remove pry and rspec-longrun from Gemfile.
Merge pull request #201 from duggiefresh/doug-fix-readme

README - Minor typo correction
Implemented NMatrix#data_pointer method to get the data location in
memory. Fixed ordering of dense structure members in nmatrix.h to match
design.
Merge branch 'master' of github.com:SciRuby/nmatrix
Fixed bug which was causing rake spec to run specs twice.
Made clone_structure public and fixed a spec context name problem
mentioned in #54.
Improvements to NMatrix.random
added reshapeBang function to reshape in place
tests added
new shape can now be passed in different ways
new shape can now be passed in different ways in normal reshape method also
reshape! not allowed on reference slices
more tests
Merge pull request #203 from rajatkapoor/reshapeInPlace

reshape! added for dense matrices, fixes #169, supercedes #192
Added PCD file reader (for Point Cloud Library), and removed some of the
autoloads in NMatrix::IO.
Updates to history and README
Merge branch 'master' of github.com:SciRuby/nmatrix
Update history