tells Python to treat the string as a unicode string (issue with foreign language)

which fixed this kind of issue:
File "migrate.py", line 219, in <module>
    print "Created: {0} with {1} comments".format(issue['title'], comment_count)
UnicodeEncodeError: 'ascii' codec can't encode character u'\xe9' in position 1: ordinal not in range(128)
Allow to specify a bitbucket issue ID to start import

Useful in case where the import crash in the middle of the processing (like an encoding issue), or if the user don't want to import all the issues
add the new -f option
Typo in line 50. Made the repo work by splitting the string.
Merge branch 'master' of https://github.com/rowanc1/bitbucket_issue_migration
Merge pull request #1 from rowanc1/master

Fixed bug in the inputs to work with pygithub3 issue creator.
the default indice to import all the issue is 1 not 0...
-> fix the issue with enconding in dry-run mode
-> The password is now hidden when typing
Merge pull request #5 from ychartois/master

Encoding and import filter