Bump version to 0.6.0.9.pre (pre-release)
Exclude Mac OS X binaries from doc files
Add some files to .gitignore

Ignore "tags" file (e.g, from ctags) and Mac OS X and Windows binaries.
Change Time.times to Process.times

test/testfftw.rb uses the now obsolete Time.times method which has been
replaced by Process.times.

Also set required_ruby_version to ">= 1.8.0".  I think Process.times was
introduced in 1.7.something, but I think requiring 1.8.0 or newer is
reasonable.
Exclude narray.dll from doc files
Bump version to 0.6.1.0.pre (pre-release)
Define classes and modules under NArray class

This defines all classes and modules under the NArray class (other than
the NArray class itself, of course).  This is done to reduce the
potential for namespace conflicts at the top level.  This change has
been done in a backwards compatible way so it should not break existing
code.  New code that wants to use the namespaced classes and modules
must do:

  require 'narray/narray'

That will define the NArray class at the top level and the following
classes and modules under the NArray class:

  NArray::NMath
  NArray::NVector
  NArray::NMatrix
  NArray::NMatrixLU
  NArray::NArrayScalar

Existing code that does:

  require 'narray'

will work as before because that loads the namespaced classes and
modules and then creates top level aliases for them.
NMatrix compatibility
README for NMatrix users and gem