v4.0.0

Breaking changes

• Design of controls was updated (#1853).
• Stylus was changed to PostCSS (#1912).

Notable changes

• bem-core library was updated to 3.2.0 (#1966).

Bug fixes

• An issue in BEMHTML template of menu which prevented to use bem-xjst was fixed.
• An issue in checkbox-group with absence of buttons separator was fixed (#1896).

Other changes

• Extra files were excluded from npm and bower packages.
• Documentation updated.