release: ready to release v1.5.0

release: ready to release v1.4.1

release: ready to release v1.4.0

release: ready to release v1.3.0

update version to v1.2.0

change version

remove cairo dependency in docs

Merge pull request 3b1b#1284 from niedong/typo-fix

fix typo docstring in scene_file_writer.py

Merge pull request 3b1b#734 from zombie110year/master

latex can't recognize path seperator \\ in windows

remove extraneous newline