Log Message:
libfilezilla: update to 0.13.0.

0.13.0 (2018-07-16)

+ Add bool return value to replace_substrings to indicate whether something has \ 
been replaced.
+ fz::sprintf: Added %c format specifier
- MSW: Work around problematic DLL export of templates, timers now work if \ 
libfilezilla has been built as DLL