Using print function

This solve #34 and using of print statements that are not compatible with Python 3.3.2.

**Note**: This PR not solve the problem using Python3:

```bash
Traceback (most recent call last):
  File "manga.py", line 269, in <module>
    main()
  File "manga.py", line 258, in main
    threadPool.append(SiteParserThread(options, None, None))
  File "/home/raniere/src/manga_downloader/src/parsers/thread.py", line 37, in __init__
    self.siteParser.parseSite()
  File "/home/raniere/src/manga_downloader/src/parsers/mangareader.py", line 35, in parseSite
    allSeries = MangaReader.re_getSeries.findall(source[source.find('series_col'):])
TypeError: Type str doesn't support the buffer API
```