[IncidentSenderRedmine] Add a missing line break in a description of an issue
[IncidentSenderRedmine] Build more friendly description

Use table to arrange information.

TODO:

* Fix tests
* Add summary & links
[IncidentSenderRedmine] Fix style of #include
[LabelUtils] Fix a typo

ERRNOR ->
ERROR
[IncidentSender] Add a missing brace
[IncidentSenderRedmine] buildDescription(): Care no server case
[IncidentSenderRedmine] Fix broken format of comments
[IncidentSenderRedmine] Add a link to Zabbix into a comment
[IncidentSenderRedmine] Use list to show links
[testIncidentSenderRedmine] Fix broken tests
[testIncidentSenderRedmine] Fix an obsolete test

Update description string in JSON.
Merge pull request #552 from project-hatohol/improve-issue-description

Improve issue description