Fixes issue #62
Add sh.wget() for downloading files into the fs, with tests and docs
Beef up XHR code in sh.wget(), still failing 2 in PhantomJS due to not having web server
Fix failing travis/phantomjs tests by adding testing web server--run npm install
Improve automatic filename extraction for wget
Fixed wget docs to match new filename extraction
Allow query string and hashes in wget filenames and add tests.
Add sh.wget() for downloading files into the fs, with tests and docs
Initial commit of zip.js lib
First working end-to-end unzip test passing
Adding sh.zip() but still failing a test
Add test to confirm that fs.appendFile works when file is missing.
Work thus far, still not right
Switched to zlib.js, all tests passing
Complex trees can be unzipped
All zip/unzip tests passing
Docs and update arg names to match docs
Fix tests so they pass in PhantomJS (hack, we just skip for now)
Merge pull request #164 from humphd/zip2

Implement sh.zip() and sh.unzip()
Update README.md

Realpath won't be implemented on the fs object.