Merge pull request OpenDroneMap#1215 from pierotofy/231 Re-run bug fix, --pc-quality changes

Merge pull request OpenDroneMap#1201 from pierotofy/221 Improved orthophotos, added --pc-quality flag

Update VERSION 

Merge pull request OpenDroneMap#1172 from pierotofy/210 Update OpenSfM

Merge pull request OpenDroneMap#1156 from pierotofy/python3 ODM 2.0 - Migration to 18.04, Python 3.6, new features, bug fixes Former-commit-id: ef174de

Update VERSION Former-commit-id: 946faee

Merge pull request OpenDroneMap#1136 from KatamSW/shots-bug-fix Fix bug when generating shots when there are several reconstructions. Former-commit-id: 3a433cf

Merge pull request OpenDroneMap#1132 from pierotofy/odmfilterpoints odm_filterpoints improvements Former-commit-id: 7947df0

Merge pull request OpenDroneMap#1057 from pierotofy/multispec Multispectral support, TIFF support, split-merge speed-ups Former-commit-id: 48a5369

Merge pull request OpenDroneMap#1036 from smathermather/master Pull in latest Former-commit-id: f1944ba