Add the ability to replace spaces in the seriesname with an alternate (e.g. a ".") without changing the spaces elsewhere in the name.

Example Usage:
--------------

In config set
    'use_alternate_seriesname_seperator': True,
    'alternate_seriesname_seperator': '.',
    'filename_with_episode': '%(seriesname)s.S%(seasonnumber)02dE%(episode)s - %(episodename)s%(ext)s',

For an output format of
	Law.&.Order.S01E01 - Prescription for Death.avi
Fix a spacing error