Merge pull request #9 from quamilek/release-1.4.0

Bumped version to 1.4.0
Fix UnicodeEncodeError in render widget
Merge pull request #11 from quamilek/fix/unicode-error

Fix UnicodeEncodeError in render widget
Bumped version to 1.4.1
Merge pull request #13 from quamilek/release-1.4.1

Release 1.4.1