add option for custom highlightClass
don't overwrite options level with step level
Merge pull request #330 from connyay/allow-custom-class-on-helper

Allow custom class on helper
add progress bar
reset focus and make enter key behavior more sane

pressing enter while focusing on skip or previous shouldn’t go to next
step
Merge pull request #339 from connyay/add-progress-bar

add progress bar support
Merge pull request #340 from connyay/issue-337

reset focus and make enter key behavior more sane
unify and fix position left and right handling
Merge remote-tracking branch 'upstream/master' into merged
Merge branch 'position' into merged