chore(dist): update readme about usage and gulp package versions
chore(gulp): add a line telling that the `publish` step is necessary
fix(npm): fix the path for the entry-point
chore(gulp): remove the `gulp test` command as it's moved to `npm test`
fix(story): update the 'level' story to be more natural
fix(gulp): fix the bump command
bump: bump to 0.5.2
Merge branch 'release/0.5.2'
Merge tag '0.5.2' into develop

Instant Crush
chore(travis): remove unsupported engines