[FaceRest] Make sure to clean up on the exit from mainThread() even if it's due to an exceptin.
[DBClientHatohol] Fix a problem that doesn't return the correct query result when start ID is specified.
[testDBClientHatohol] Clean up.
[testDBClientHatohol] Rename a test case to avoid developers from confuse 'Offset' with that of an SQL statement.
[testDBClientHatohol] Clean up.
[testDBClientHatohol] Clean up.
[testDBClientHatohol] Clean up.

This commit removed the pre-check of the expected number of elements,
because it is unneccessary to make sure the result.
[testDBClientHatohol] Clean up.
[testDBClientHatohol] Clean up.
[testDBClientHatohol] Clean up.
[testDBClientHatohol] Clean up.
[testDBClientHatohol] Clean up.
[testDBClientHatohol] Clean up.
[testDBClientHatohol] Clean up.
[testDBClientHatohol] Add a new test: test_getEventWithStartIdWithoutSortOrder().
[testDBClientHatohol] Add a new test: test_getEventWithMaximumNumberDescendingStartId().
[testMain] Enhance the visibility of the namespace.
[testMain] Fix a comment.
[testMain] Show information to investigate the issue (#61).

The following error sometimes happens. The patch gets the
hint for the cause of the problem.

https://travis-ci.org/project-hatohol/hatohol/jobs/13364516
[server][doc] Update a REST specification.

The implementation has not been done yet.