detect VST >= 2.4 plugins.
print a warning for every VST >=2.4 plugin

17:29 < rgareus> las: ok. I'll make this translatable, but this warning will show up every time ardour starts (and scans for plugins) which can be annoying.
17:30 < las> rgareus: yeah, well we need to do black/whitelisting of plugins anyway so ...
improve architecture detection

Recognize ppc64, ppc, s390x, s390 CPUs, default to 'none' instead of
i686 (which tries to build with SSE and fails on non-x86 architectures).
don't overwrite necessary compiler flags

Distinguish flags influencing optimization (overridable) from those
necessary for building (e.g. for using SSE).
ignore "unofficial" states in jack_sync_callback()
Merge branch 'master--ignore-JackTransportNetStarting' of https://github.com/nphilipp/ardour
use std::fill_n to fill gain buffer with samples

Using memset fills the buffer with whatever 1.0 as a double or float has
in its LSB.
use correct argument order with memset()
compare region names case-sensitively
don't use deprecated g_strcasecmp()

It's dependent on the current locale and deprecated, use
g_ascii_strcasecmp() instead.
add cmp_nocase_utf8()

This is like cmp_nocase(), only that it doesn't use toupper(), tolower()
and therefore is agnostic of the current locale, and attempts to compare
strings in a UTF8-aware way (or falls back to ASCII if one of the
strings isn't UTF8-encoded).
compare plugin/creator/category names UTF8-aware
fix const-ness of names array
adjust LV2 ringbuffer size according to LV2:resize-port

The message-size itself is part of the message which
stored in the ringbuffer. If the rinbuffer overflows
the message is misinterpreted -> segfault.

Choose a more conservative ring-buffer size and take
the requested LV2 size into account.
change event propagation to be based on parent/child lineage, not z-axis stacking, plus some more alterations to try to get enter/leave working
fix merge conflicts from master
change enter/exit event delivery to follow X Window model (inferior, ancestor, virtual, nonlinear)
tweak for regionview enter/exit handling