Merge branch 'master' of github.com:xirang/xirangeps
 * rm extrol spaces.
 * change the error info for captcha field.
* update bootstrap style.
 * add getPositionDivider function.
 * modify divider style of positiondivider.
 + add loadimage.
 * adjust the style of article module.
Merge branch 'master' of github.com:xirang/xirangeps
 * adjust code.
Merge branch 'master' of git@github.com:xirang/xirangeps
 * return the captcha form directly.
 * rewrite loadimage logics.
 * format codes.
Merge branch 'master' of github.com:xirang/xirangeps
Merge branch 'master' of git@github.com:xirang/xirangeps
 * add colon translation.
  + add link for contact.
 * judge whether logo exits or not.
 * adjust the style of header.
Merge branch 'master' of github.com:xirang/xirangeps
 + import the captcha module.