Adding OPML parser initial version

* Given a OPML file, it parses the links out
Merge branch 'master' into opml-parser
Adding UPLOAD_FOLDER param to config
Fixing bug with Field initialization

* Empty fields were being initialized to "" whereas it should be
  initialized to None
Fixing bug with wrong function call
Adding method to get uid from user object
Adding route to import an OPML file
Adding comments
fix get_uid isnt required

uid is available as an object property
Merge pull request #12 from vkarthik26/opml-parser

fix get_uid isnt required
Merge pull request #10 from shrayas/opml-parser

OPML Parser finished