chore(release): 5.1.0 [skip ci]

chore(release): 5.0.3 [skip ci]

chore(release): 5.0.2 [skip ci]

chore(release): 5.0.1 [skip ci]

chore(release): 3.0.2 [skip ci]

chore(release): 3.0.2 [skip ci]

- Working with multiple layers of codes #2

- Target blank bbcode does not work #4

es6 module loading

removing bower

adding babel