allow multiple searches with the comma trick

fixes quicksilver/Quicksilver#1726
bump version and build number
remove unused files and framework references
set the product name automatically
switch to Apple's official string replacement method
check for empty searches to prevent a crash
ignore empty search terms
relocate the beep

and return something right away when the search is empty
remove the unused encoding parameter

When it came down to it (in resolvedURL:forString:), the encoding
variable was never used.
Merge pull request #4 from quicksilver/updates

Updates