start of setxattr and getxattr implementation
rebased
implementation of getxattr
started spec tests and exposed to FileSystem prototype
work on getxattr
added more tests and added spec file to test manifest
changed behaviour to allow falsy values (ie. empty string), added more test cases and modified README.md
fixed unnecessary null checking and replaced it with hasOwnproperty method, also added removexattr and fremovexattr and tests for it
continue work on tests and clean-up code
fixed null value and refactored setxattr
removed comments and patched parameter name and potential undefined error
Merge pull request #84 from btulchinsky/xattr

Implement setxattr, getxattr