Document is updated for alarm quota.
Update doc for put metric alarm limitation
Admin alarm is introduced.
(only admin can create/delete/update alarm which starts with "SPCS/")
Do not meter admin alarms
Dimension filter - full filter, name filter and value filter are
implemented.

* full filter: matches all name and value pair
* name filter: matches all names (names list matching)
* value filter: matches all value (full text search for values)
Document about dimension filter is updated
Document updated