BIRNET: fixed includes
SFI: fixed method resolution for unknown template base class
TOOLS: fixed includes
BSE: fixed dangling pointer to temporary
SFI: roll our own cescape function

With Gnome bug #664830, g_strescape starts to produce "\v", which
GScanner cannot handle. Our own cescape function avoids generating
characters that GScanner cannot handle.
BUILD: support V=1 for check rules
SFI: keep first reference of static GParamSpec structs around
BSE: work around regressions introduced in  g_object_class_install_property

See Gnome bug #686652, g_object_class_install_property falsely forces
properties to be readable or writable.
BEAST-GTK: work around gtk_grab_add asserting realized widgets
BEAST-GTK: work around regressions introduced in  g_object_class_install_property

See Gnome bug #686652, g_object_class_install_property falsely forces
properties to be readable or writable.
BEAST-GTK: work around GtkSpinButton asserting page-size=0 in adjustments
PO: force update-po for make dist
BSE: fixed build dependency
DOCS: revamped download logic, check ages upon make dist
BUILD: update distuninstallcheck_listfiles

Work around more files left over by update-mime-database(1).
mkrelease.sh: consolidated changelog entry times
DOCS: rewrote import logic for wiki documentation downloads
DOCS: catch failing groff invocations
DOCS: handle import stamp in srcdir
DOCS: import online docs for 0.7.6 release