* Rewording some of the message sequence nodes
* Fix batch test for overlap renaming
* Finish msg-sequence node help rewording
* Rename maxKeptMsgsCount to nodeMessageBufferMaxLength
* Rename nodeMessageBufferMaxLength in tests
* Remove Join-merge mode for later rework
* initial support of BATCH node
* add concat mode & fix for docs and js code
* add tests for BATCH node
* minor correction of typo
* allow interval in float
* fixed message catalog
* add test for too many pending messages & related fixes
* update info document on batchMaxKeptMsgsCount
* fixed close callback
* fixed info document
* add initial topics entry of concat mode
Hiroyasu Nishiyama
Nick O'Leary