added spec for issue #51
added additonal slice specs
more slice spec fixes
Elementwise operations fixed on dense matrices for bug in #51.
Added RDoc 4.0.1 dependency, removed #ifdef's
Merge pull request #81 from agarie/rdoc_dep

Added RDoc 4.0.1 dependency, removed #ifdef's
Removed csquare reference, way past necessary
Fixed transposes on slice-by-reference dense matrices.  (Fixes #51.)
fix memory leak in tranpose of slice by reference
Use `bundler` to install development dependencies
Now find_newer_gplusplus can find g++ 4.8

Just added `8` to the array inside the function. Is there a more robust way to
do this? If I didn't know about extconf.rb and how it's structured, I wouldn't
have done this change. There's going to be g++ 4.9, 5.0, etc eventually. :(
added spec for each and each_stored_with_indices on sliced by reference dense matrices
fixed slice by reference issue with each and each_stored_with_indices
Removed language assumption in extconf (#77)

This applies the patch found in issue #77, that is, extconf.rb doesn't assume
the user's shell language is english. Instead, it forces it to be US english
for the relevant process.
Merge pull request #84 from agarie/extconf

Support for g++ 4.8, removal of en_US assumption
Merge pull request #83 from andrioni/patch-1

Change CONTRIBUTING.md to use `bundler` to install development dependencies
Merge branch 'ref_slice_ops_issue51' of https://github.com/cjfuller/nmatrix into cjfuller-ref_slice_ops_issue51
changed calloc calls to ruby alloc macros
added null check to deletion code and changed each iterators to pass NULL for elements
Add .gem to gem install command