Make some *PropertyT constructors private to prevent accidental misuse.

See merge request !31

These constructors were introduced in 26e2fe64 to implement clone(),
but their signature might suggest uses that would result in memory corruption.

Support vs2017

See merge request !30

This reverts commit 3a6be129.

use anchors for job definitions

use cmake in PATH for Windows CI jobs

See merge request !28

Use CMAKE_CURRENT_SOURCE_DIR instead of CMAKE_SOURCE_DIR

See merge request !27

rename swap_*s methods to swap_*_indices and make them public

See merge request !26

Fix mesh copying by implementing copy constructors and clone methods

Closes #5

See merge request !25

Fixes #5.

Mark vertex_texcoords_available() as const

See merge request !23

Property map hfh int support

See merge request !22

Fixed CI on Windows

Closes #4

See merge request !21

enable ```__cplusplus>=201103``` guarded code on recent MSVC.

See merge request !19

MSVC does not define __cplusplus as >=201103 yet.
An older version of MSVC is probably sufficient, but I can't test that.

Fix cppchecks

See merge request !18