Log Message:
Update to 0.78

Upstream changes:
0.78	- 29 Jan 2018, H.Merijn Brand
    * Spreadsheet::ParseExcel supports the active flag as of version 0.61
    * Fix typo in docs (SPROUT, RT#124214)

0.77	- 22 Jan 2018, H.Merijn Brand
    * Note possible name clashes with example/tool files
    * Clipping and stripping more efficient