rewrote some text, added space splitting and score_split
all lowercase now, added [splitprefix]
version 0.1.10

added whatcd logout
improved:
* searchstr creation
* tag splitting
* tag filtering
* tag replacing
* some other code
splitting:
* now also by SPACE if first part is in [splitprefix] (tags.txt)
* tag parts wont get reduced score anymore
* introduced SCORE_SPLIT as modifier for "base" tag
fixed bugs:
* problem with uppercase file extentions
* artist score counted double when artist==albumartist
* user score calculation with negative score
* various artist recognition