Refactored getting list of links for a subreddit in order to avoid duplicating code. Also Fixes #19
Refactored submission_getter method to be more parametrized - it returns either a list of links, or the entire submission list. This ensures the capability to use the method to further process self posts, not only links
Implemented --self argument to show the self text of a post (if any). Fixes #7. Also done significant refactorings that simplifies retrieving subreddits + added code comments
Updated readme to include documentation about --openrange and --self
Merge pull request #20 from RaulLepsa/master

Further refactoring + fixes + code commenting