with default value of 64
* Updating writeIntoLiveView method to use max_live_view_insert_blocks_before_refresh
from global context instead of hard coded number
* Adding squashing of the result blocks similar how it is done in materialized views
* Fixing bug in writeIntoLiveView that caused incoming block to be processed twice
when maximum number of insert blocks was reached
and making the setting to be in seconds instead of usec
* Updated LIVE VIEW table to keep version consistent as long as the server is up
* Removed calculation of hash in writeIntoLiveView method as it is recalculated
in the LiveViewBlockOutputStream
* Changed to using values from the local context for live_view_heartbeat_interval and
temporary_live_view_timeout instead of the global context
* Updated LIVE VIEW tests to match the changes
* Adding support for watching live views via HTTPHandler
* Small fix to WriteBufferValidUTF8.cpp to propagate next() call
* Updated copyData.cpp to treat block with no rows as
"flush block"
* Updated PushingToViewsBlockOutputStream.cpp to directly use
LIVE VIEW output stream instead of calling its write method
