Made object oriented | Added python 2 support

[JulesGM]

I tested it. Works fine.

[JulesGM]

The globals were not super nice to use the library as part of another script instead of just using the script from the command line.

[JulesGM]

Ah, also, I made it support UTF-8 in python 2

[abubelinha]

@JulesGM thanks, I guess you corrected what I mentioned in #10

How can I make your corrected file work in Python 3?
I tried to load it to use in the middle of a script, like in the repository tests.py:

from torsimany import torsimany
torsimany.justdoit(input_file_path, output_file_path)

But that doesn't work: AttributeError: module 'torsimany.torsimany' has no attribute 'justdoit'

Sorry, I am not an expert programmer. No idea about how to use it "object oriented". I guess I have to import it in some other way.

Thanks @abubelinha