b/f:sbc:cc bl_redis: avoid busy loop of connections handling thread
c/f: fix of 3c06c6b23 for dsm/sbc call control module
b/f:core: handle AmMimeBody boundary correctly in addParts
core: made RTP/SAVPF profile known to sems
core: sdp payload may be in multipart body
core: new AmMimeMody methods
- added public method deletePart(const string& content_type)
- added private methods clearPart(Parts::iterator position) and
  convertToSinglepart()
apps/dsm/mod_dlg: new action dlg.deleteReplyBodyPart(content_type)
- added also dlg.addReplyBodyPart to Readme
core: added info method to AmSipDialog
apps/dsm/mods/mod_dlg: added dlg.info action
sbc: b/f: lower case before searching in message filter
sip: fix compile errors on osx with clang++
sip: fix memory leak while sending 200/ACK
core: downgrade error msg to debug
dsm mod_dlg q/f: make compilable
apps/dsm/mod_sbc: added message_filter and message_list profile variables
doc: added Readme.jsonrpc file
apps/jsonrpc: bug fixes

- error member cannot exist if there was no error
- id member must be of same type in response as it was in request
- id cannot be bool
apps/jsonrpc: do not include 'error' member in response

- one more place where initializing of rpc_res["error"] to null needs
  to be removed in order to prevent error member appearing in response
  when there is no error
apps/jsonrpc: do not include "result" member in error response