Add file name encoding fix section in README
Update README.md
Add in setup.py for ArchLinux packaging
Fix the download speed problem.

https://github.com/houtianze/bypy/issues/61#issuecomment-49038559
Merge pull request #64 from seanlis/downspeed

Fix the download speed problem. (by @seanlis)
Change the default download chunk to 20M
Add the link for setting up UTF-8 environment
Update README.md