Update to v1.6.5

Merge pull request #287 from crowi/wip-v1.6.4

Prepare for v1.6.4

Merge pull request #246 from crowi/wip-v1.6.3

Prepare for 1.6.3

Merge pull request #233 from crowi/wip-v1.6.2

Wip v1.6.2

Fix: invalid conditions

Merge pull request #175 from crowi/wip-v1.6

Prepare v1.6

Merge pull request #159 from crowi/wip-v1.5.3

Prepare v1.5.3

Merge pull request #138 from crowi/wip-v1.5.2

Prepare: v1.5.2

Merge pull request #136 from crowi/wip-v1.5.1-0

v1.5.1

Merge pull request #115 from crowi/wip-v1.5.0

WIP: Prepare v1.5.0