Some style changes

Hey, i make some style changes, maybe it usefull for others :)

correct styles:
  - add 'id' attr to header level 3 and 4
  - add parse for list block header
  - add 'id' attr to lists

change styles:
  - change styles for admonitionblock, make it as 'alert-block'
    instead of just label. translation for notes and important to
    bootstrap styles.