Promote 'Intent to Implement' from wiki to website
Merge pull request #105 from crosswalk-project/intent-to-implement-1362

[do not merge] Promote 'Intent to Implement' from wiki to website
Tizen extensions modifications

As per https://crosswalk-project.org/jira/browse/XWALK-1363
Manually install web application on Tizen IVI

A comment on XWALK-1363

https://crosswalk-project.org/jira/browse/XWALK-1363?focusedCommentId=17476

explains that it is not OK to use hard-coded user IDs to install
rpms on Tizen.

For that reason, use a manual install with xwalkctl to install
the web app part of the Tizen IVI extension example.
Fix poor formatting on Tizen target setup page