update README
updated README
Fix to the bulk search when logged in as a non admin

The search filter was broken and didn't return the expected result. Should
be fixed.
Quick fix to the sanitization

- the double sanitization needed a quick fix until the development branch
  gets merged in the future
Fix for the search

- Due to the sanitization being fixed, the search results broke

- This is a quick copy of the fix implemented on develop by cvandeplas
Named pipes and mutex

- added the 2 types under the artifacts dropped category
Merge branch 'namedpipes_mutex'
Show the org logo in the memberslist
Fix to the highlight issue

- new line at the end of the search list would break the highlighter and
  throw a warning
  - fixed
Sanitization of the data when creating .ioc files
Tightened the export rules

- text, xml, ioc exports of attributes with to_ids == 0 are now
  blocked.
Bug with attribute edits

- users without publishing rights couldn't edit attributes. Fixed
Merge branch 'master' of https://github.com/MISP/MISP
fixes #141
Merge branch 'develop' into 'master' for v2.1
Notification on rest add of published events. Fixes #138
Merge branch 'hotfix-2.1.1' into develop