MVE: App scene2pset updated
DMRECON: precompute srgb2lin mapping

Computing this on demand leads to nasty race conditions and 256 floats
are not _that_ much, so use a precomputed table instead of protecting
it with a mutex.
Merge pull request #40 from Waldteufel/srgb2lin

DMRECON: precompute srgb2lin mapping
DMRECON: Small style change
APPS: Parallelized scene2pset with OpenMP statements
MVE: Added generic attribute 'value' to TriangleMesh, updated PLY reader and writer
UMVE: Added support for the per-vertex value attribute in the mesh list
DMRECON: share image pyramids between threads

Threads reconstructing views from the same scene simultaneously can
share some of their image pyramids when they both use the same
neighboring view. Store them in a global cache.
MVE: Options struct for save_ply_file instead of parameter list
Merge pull request #38 from Waldteufel/cache

cache image pyramids
Merge branch 'master' of github.com:simonfuhrmann/mve
DMRECON: clamp dot product to [-1, 1] for acos

Due to floating point precision, the dot product of two unit vectors
can be outside [-1, 1], which causes acos to return NaN. Clamp the
values to the domain of acos to avoid crashes in rare corner cases.
DMRECON: use std::abs instead of fabs

std::abs is C++ API, fabs is C API.
Merge pull request #41 from Waldteufel/acos

DMRECON: clamp dot product to [-1, 1] for acos
MVE: add methods is_mesh_edge and get_faces_for_edge to VertexInfoList
Merge pull request #43 from karoettchen/upstream

MVE: add methods is_mesh_edge and get_faces_for_edge to VertexInfoList
DMRECON: allow controlling verbose output

Detailed information on queue size and the number of filled pixels
on stdout is not relevant when e.g. running dmrecon from UMVE, so
make that controllable.
UMVE: disable verbose output from dmrecon

Progress is shown in the GUI, so don't print it to stdout.
DMRECON: implement fancy progress bar

A progress bar rendered with ANSI escape codes is more informative
and more visually pleasing than the log output. Allow the user of
dmrecon to select silent, simple or fancy progress output.
Merge pull request #44 from Waldteufel/fancy-progress

DMRECON: display a fancy progress bar with ANSI escape codes