OpenMVG v1.5 “Coho Salmon” is out

What's new:

• 21 PR has been handled.
• 29 issues/features enhancement has been completed.

OpenMVG core:

Multiview

• Add a new P3P solver "Lambda Twist: An Accurate Fast Robust Perspective Three Point (P3P) Solver, ECCV 2018. Thx to @rjanvier & @midjji #1500

SfM

• Enhancement to SequentialSfMReconstructionEngine2
  • fix possible infinite loop #1241
  • enhance resection stability #1399
• Enhanced unit test for robust triangulation #1520

Software/SfM

• Add Spherical SfM scene to Cubic SfM Scene converter to allow to use MVS on spherical SfM scene (Thx to @li.guan) #1505

Tracking

• add a unit test for union_find #1550

Clustering (NEW)

• Add a Kmeans implementation (Llyod) @rperrot #1476

Build enhancement

• Fix a CMake build error related to OSI/CLP/COIN (regression) #1463
• Update Dockerfile to use ubuntu::bionic #1464
• Fix some CXX Flag transitivity with cmake build system #1176
• Enhance iOS build support #1300

Continuous Integration

• Update Travis.ci to build on macOS 10.13 and 10.14
• Faster windows CI (no debug build)

Documentation

• Update doc for Microsoft vcpkg #1531 (official port! -> vcpkg install openmvg[core,openmp])
• Update doc for the Docker interface

UI

• Fix GCP registration if the numbering is not continuous #1536