Remove unused argument `_hex`
Print "Failed to load c++ bson extension" to stderr

Warning "Failed to load c++ bson extension, using pure JS version" should be printed to stderr instead of stdout.

All diagnostic output should go to stderr. Printing to stdout breaks command line programs, whose output is parsed by other tools.
Merge pull request #59 from nailgun/patch-1

Print "Failed to load c++ bson extension" to stderr
Merge pull request #56 from ForbesLindesay/patch-1

Remove unused argument `_hex`
Updated nan version and gyp file
Updated travis file
Updated nodeunit version
Including nan.h file to avoid install issues
Added nan.h file
Updated nan.h
add isValid validator method to ObjectID object
Experimental new js bson parse
Rewrote to minimize bailout for big objects
Typo fixes
Use new nan dependency include method
Updated bson to 0.2.6, returning nan requirement
Fix, an object with type ObjectID should be able to convert itself without throwing exception
ObjectID.equals against null, returns false #70
Merge remote-tracking branch 'mandyscott/master'
Merged in #65 and added tests and some fixes