Use four spaces as indentation

http://pylint-messages.wikidot.com/messages:w0311
Create main()
Remove unused import. Remove unused assignment
Loop through results instead of converting to string and souping
Search for first subject span and don't catch all exceptions
Extract downloading code into own function
Return 0 on successful downloading
Add main docstring with usage
Extract download_path variable
Use python from env instead of exact path

For using virtualenvs
Start of fancy progress-bar
Fancy progress bar with the blessings module
Update readme with how to get the fancy progress bar
Merge pull request #8 from Gosha/fancy-progress-bar

Fancy progress bar and huge refactoring

t-thanks gosha