Minor visual fix for TVs' input/output options panels/tab
Notice on execute $source->getBases()
Update _border-radius.scss

http://caniuse.com/#search=border-radius
Update _box-sizing.scss

http://css-tricks.com/box-sizing/
(see end of this article)
Update _box-shadow.scss

https://developer.mozilla.org/en-US/docs/Web/CSS/box-shadow?redirectlocale=en-US&redirectslug=CSS%2Fbox-shadow
Update _user-select.scss

Prefixed properties must be before the normal-state property.
Fix radio buttons so the left 1px isn't clipped
Update of Czech translation for 2.2.9
Fixed #10135

Correct merging of output of OnSiteSettingsRender plugins.
Create README.md
Update README.md

Fixed links rendering as <code>
Update README.md

A <ul> looks nicer.
Update README.md

I am a markdown noob
Update README.md

Final clean-up bits
Edited README.md

Re issue comment:
https://github.com/modxcms/revolution/pull/591#issuecomment-23623978
Fix: RegisterLogging clear variable handles "false" (string)
Make path param optional in modFileMediaSource::getBases()

Merge remote-tracking branch 'origin/pr/522' into pr/522

* origin/pr/522:
  Notice on execute $source->getBases()
Minor visual fix for TV input/output options

Merge remote-tracking branch 'origin/pr/520' into pr/520

* origin/pr/520:
  Minor visual fix for TVs' input/output options panels/tab
Merge remote-tracking branch 'origin/pr/579' into develop

* origin/pr/579:
  Update _border-radius.scss
Merge remote-tracking branch 'origin/pr/580' into develop

* origin/pr/580:
  Update _box-sizing.scss