Fs.proxy

Fixed
- Bad version specifier for `fs` dependency
Removed
- Redundant definition of the `fs.proxy.writer.ProxyWriter.validatepath`

Added
- Examples to README.rst
Fixed
- Wrong super() argument in fs.proxy.writer
- fs.proxy._utils.__all__ containing an undefined name cause by
renaming of `unique_everseen` to unique
- tested example in README.md failing in Python 2
- requirements not installing on a wheel install

Fixed
- Wrong readme name causing setuptools to ignore the actual readme

Added
- README, COPYING and CHANGELOG files
- configuration for Travis-CI
- `setup.py` file configured with `setup.cfg` (requires setuptools)
- Base proxy classes in `fs.proxy.base`
- Writer proxy classes in `fs.proxy.writer`, making read-only filesystem
writeable through a proxy filesystem

[Unreleased]: https://github.com/althonos/fs.proxy/compare/v0.1.3...HEAD
[vO.1.3]: https://github.com/althonos/fs.proxy/compare/v0.1.2...v0.1.3
[vO.1.2]: https://github.com/althonos/fs.proxy/compare/v0.1.1...v0.1.2
[vO.1.1]: https://github.com/althonos/fs.proxy/compare/v0.1.0...v0.1.1