Updated method signature for FakeFS::FakeSymlink#respond_to?
* Old version only accepted one parameter, which was no longer correct
  as of Ruby 1.8.6 (or older - I can't tell when the change happened).
* Test suite validates the method accepts both parameters and that
  the behavior is implemented correctly.  It also validates that the
  default values are resolved correctly.  Note that the change in
  behavior in Ruby 2.0.0 for the second parameter was implemented by
  modifying the meaning of the second parameter (from include_priv
  to include_all) rather than changing the default value (which
  remained false), but it is still better not to copy method
  signatures if possible.
Resolved test suite problem with Ruby 2.0.0
* Ruby 2.0.0 changed the default script encoding from US-ASCII (as far
  as I can tell) to UTF-8.  A side effect of this is that it breaks one
  of the tests that assumes that a literal string will be in a specific
  encoding.  This was resolved by using force_encoding.
* This should resolve all the outstanding issues with the test suite
  under Ruby 2.0.0 (and I hope 2.1.0), so the .travis.yml file was
  updated to reflect this.
Fixed up FakeFS::File.read and .binread to respect options
* FakeFS::File.read was ignoring the passed options completely!  The
  updated test suite checks a variety of scenarios, including specifying
  all the combinations of length and offset being present or not as
  well as passing in an options hash for open.  The updated code
  passes the test suite.
* FakeFS::File.binread wasn't actually doing a binary mode read!
  A test for this scenario was added, and the code was simplified
  now that FakeFS::File.read could be relied upon to implement the
  spec properly.  Note that the previous .binread would have failed
  a test where an offset was specified with a length of nil.
Update spec_helper documentation for latest rspec
Added world_readable? and world_writable.
Values returned by this are platform dependent, Unix 777 has been chosen.
Add absolute_path to File class.
Make absolute_path method a class method.
Make absolute_path respect original method's signature.
Code cleanup.
Make absolute_path method available only for Ruby version 1.9.1 or above.
Update absolute_path to use the fake file system's working directory.
Fix absolute_path spec.
Changed behaviour of File.delete to allow no arguments, like the actual File.delete
Make File#rename work as expected when destination directory does not exist.
Remove fakefs.gemspec from .gitignore

Signed-off-by: Kris Hicks <krishicks@gmail.com>
Merge branch 'master' of https://github.com/defunkt/fakefs into world_readable
Merge pull request #240 from paologianrossi/fix_rename_edgecase

Make File#rename work as expected
Merge pull request #242 from pivotal-cf-experimental/master

Remove fakefs.gemspec from .gitignore
Merge pull request #237 from Zequez/master

Changed behaviour of File.delete to allow no arguments, like the actual File.delete
Merge branch 'add_absolute_path'

* add_absolute_path:
  Fix absolute_path spec.
  Update absolute_path to use the fake file system's working directory.
  Make absolute_path method available only for Ruby version 1.9.1 or above.
  Code cleanup.
  Make absolute_path respect original method's signature.
  Make absolute_path method a class method.
  Add absolute_path to File class.