add type="button" to all close buttons

See https://github.com/twitter/bootstrap/issues/3465 and
http://twitter.github.io/bootstrap/javascript.html#modals
added "inlineErrors" option to TbActiveForm (thanks @dolpox)
changed name to "hideInlineErrors", reversed default value
add role="presentation" to menu headers
Merge pull request #86 from Jalle19/use-role-presentation

add role="presentation" to menu headers (continuation of #82)
Merge pull request #81 from Jalle19/tbactiveform-inline-errors

added "inlineErrors" option to TbActiveForm (thanks @dolpox)
Merge pull request #80 from Jalle19/fix-modal-close-button

add type="button" to all close buttons
Change to use PSR1-2