Blender 2.77a: Use proper char for the release

Fix UV-Editor crashes w/ over SHRT_MAX UV's

Fix T47705: Freestyle line glitch.

The addressed issue is a regression from Blender 2.75, after the internal
switch from double to single precision floating-point numbers in the
Freestyle code base. Face normal calculations require the higher
precision during the computations, even though the results can be stored
as single precision numbers.

Correct merge error

Remove newly added function (harmless but unused)

Blender 2.77a: Point addons to a new submodule hash

Particles: Fix broken grid distribution in some case from own recent rB201d3938622.

Fix T47902: Particle grid not using modifier stack, Take II.

Now only fix correct handling of use_modifier_stack for grid distribution,
fixing it globally breaks all existing edited hair systems. :/

Revert "Fix T47902: Particle grid not using modifier stack."

This reverts commit 2bd3acf7cd27c0c3ee77b10d56b91c3b03226d39.

Commit is valid in theory - but in practice, it means nearly all edited hair systems
would need to be re-created from scratch... Not nice, so better revert and note in code
that particle distribution is ugly and does not respect 'use modifier stack' option in most cases.

Fix T47902: Particle grid not using modifier stack.

Disclaimer: this is tentative fix, seems to be working but you never know with particles.
If issue arise, we'll just revert this commit and hide 'use modifier stack' option
for grid distribution instead.

This commit also try to make choice of which dm to use during distribution more generic
(deduplication of code), again hopping not to break anything. :P

Fix error in ghash/gset_ensure_p_ex

The key is needed in the case the ghash resizes.
Caused regression T47984.

Fix T47939, take II: Check clang package version, not llvm-devel one.

Looks like some distro still provide llvm-3.4-devel, while no more clang-3.4.
Since clang depends on llvm of same version, check clang only should ensure
us we also have matvhing llvm... *sigh*

Fix T47939: Install Deps OSL 1.7.1 and clang-3.5

Until we officially support llvm3.5 or more, only allow for 3.4 llvm packages,
and build own stuff otherwise...

Fix T47848: Fix regression in sequencer GL render

Own changes in 2.77 broke off-screen render with scene render size doesn't match output.

Cycles: Fix wrong camera in volume check when domain is only visible to camera rays

Cycles: Fix regression caused by recent camera-in-volume commit

Stupid me forgot that we don't have stop-element in the stack yet.

Fix T47971: rigid body baking crash due to thread race condition.

Fix T48030: Can't zoom VSE properties panel

Fix curve adding 3D nurbs when 2D is set

Ctrl-LMB ignored 2D constraint

Cycles: Make curves modified by a taper object with modifier considered a deform modified

That might consider a bit more objects to be considered deform modified,
but it covers common case of using taper object without require of doing
recursive checks.

In worst case it'll be just some extra synchronization time, no render
time difference will happen for false-positive because of extra checks
happening in Cycles.