Merge pull request #607 from tuanchauict/release/alpha/1.3

v1.3.5: Add new kinds of arrow

Merge pull request #603 from tuanchauict/release/alpha/1.3

v1.3.4 Simplify crossing point algorithm and allow complex combination to joinable

Merge pull request #576 from tuanchauict/release/alpha/1.3

v1.3.3: Improve moving focus shape: prefer interaction point

Merge pull request #573 from tuanchauict/release/alpha/1.3

v1.3.2: Fix bugs related to hover and move

able to move hover shape without click

Connect line and shape

More anchors and fix a minor issue (start head uses end head setting)