Fix travis error
Update .travis.yml
Adjust layout of control panel
Minor adjust of parameter range
Allow setting background color
Allow set background
Move image pool to separate script
Update for dependency upgrade
Pin dependencies
Bump version to 0.0.2
Merge branch 'master' into release
Add api error counter
Bump version to 0.1.0
Merge branch 'master' into release
Auto fit window size
Merge branch 'release'
Update dependency
Bump version to 0.2.0
Merge branch 'master' into gh-pages
Update build.js