Fix an automake warning

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/ABI-3-0-0-STABLE@34060 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
Added .docx as a default plugin.

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/ABI-3-0-0-STABLE@34061 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
Fix crash when loading a file from abicommand.

Cherry-pick from trunk@34036. From jbrefort.

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/ABI-3-0-0-STABLE@34062 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
Don't crash when exporting to .odt without a frame. Please backport.

Cherry-pick fron trunk@34041. From jbrefort.

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/ABI-3-0-0-STABLE@34063 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
Fix all warnings of builtin aiksaurus-gtk3 library and don't use it whaen available from aiksaurus itself.

Cherry-pick from trunk@34043. From jbrefort.

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/ABI-3-0-0-STABLE@34064 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6