Fix gsettings schema for commodities editor

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23319 57a11ea4-9604-0410-9ed3-97b8803252fd
Check for availability of xsltproc at configure time

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23320 57a11ea4-9604-0410-9ed3-97b8803252fd
Add a new user_symbol property to the Commodity class

Author:    Frédéric Perrin <frederic.perrin@resel.fr>

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23321 57a11ea4-9604-0410-9ed3-97b8803252fd
Use the new user_symbol property where relevant

Author:    Frédéric Perrin <frederic.perrin@resel.fr>

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23322 57a11ea4-9604-0410-9ed3-97b8803252fd
Copy the test-files to the builddir, and use that in GNC_TEST_FILES

Author:    Frédéric Perrin <frederic.perrin@resel.fr>

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23323 57a11ea4-9604-0410-9ed3-97b8803252fd