Merge pull request #96 from shaitan/master

Alpha version of dc recovery
Dump to stderr if logger interface failed to write data
v2.24.5.0
Added iostream include for std::cerr
Allowed direct meddling with sph.src (return route id) at exec_context
level. Also exec_context can now give back entire enclosed data block.
Merge pull request #97 from ijon/master

Couple more exec_context methods to allow context manipulation.
Merge remote-tracking branch 'upstream/master'