Exempi 2.5.2 is out

Exempi 2.5.2 is out.

Here are the changes:

  • Bug #18: Remove an unnecessary message to stdout in the exempi tool.
  • Bug #20: Test file formats. This also change the GIF sample to GIF89a.
  • Bug #17: make check should build more reliably now.
  • MR !1: Remove deprecated C++ to compile with C++17.
  • MR !2: Fix a build failure with C++17.