[goocanvas] (4 commits) Non-fast-forward update to branch prep-msvc-3.0

[Chun-wei Fan <fanchunwei src gnome org>]

The branch 'prep-msvc-3.0' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  8d6e10c... src/: Add goocanvasexports.h
  b1746d3... src/*.h: Mark public API/symbols for export/import
  74aa599... src/goocanvasatk.c: Add prototypes for MSVC builds
  9696e80... src/Makefile.am: Update generating goocanvasenumtypes.h

Commits added to the branch:

  c5e76a8... src/: Add goocanvasexports.h
  b3628e1... src/*.h: Mark public API/symbols for export/import
  14e0593... src/goocanvasatk.c: Add prototypes for MSVC builds
  51e6ef2... src/Makefile.am: Update generating goocanvasenumtypes.h