v0.6.0

• [+] wxc-button supports more type settings, remove normal/ highlight，add new type ahout white and blue，new button size settings, pay attention to the upgrade.
• [!] Solve the problem of too big packaging bundle of bindingx，Binding related judgments are transferred from Utils.env to BindEnv，pay attention to the upgrade. issue 191
• [+] New Binding component: wxc-refresh, at the present stage of beta, suggestions are welcome.
• [-] Remove the hints for default style of the component in weex-vue-loader high version. issue 198
• [+] wxc-popover support animation. pr 184
• [+] wxc-searchbar support setting bar-style style to cover theme color.
• [!] wxc-rich-text enhanced compatibility with iPad and Android.
• [+] Document update for Faq and Binding.