Reply() has default value for spoiler

-Removed redundant else clause append commented.id.
-Spoiler reply message now an else of `if allBooks.book != NONE:` was already done because of `if re.search('Search(All|AGOT|ACOK|ASOS|AFFC|ADWD)!', comment.body)` This was done as previously it checked twice if it was a no spoiler thread.
- Allow users to search below 3 characters again. This was a limitation because previous faulty regexp.