Generalized several templates in llstl.h in order to support more containers.
Removed several instances of is_in_map/getWearableCount being followed immediately by another lookup with the same key. find is more efficient, as we get an iterator to use instead of a simple boolean.
Updated llstring to current linden
Further linden_common cleanup
Header cleanup
Raised banlines to 5000 as per linden server change
Included missing llmediaentry.cpp file
Minor whitespace changes here and there
