fixes #286

As dicussed, now chopping string "after" converting them to UTF-8. This
prevents malformated unicode.

Also increased cut-off limit from 1024 bytes to 64*1024 bytes. Hope this is
ok - if not, please change.
Merge branch 'master' of https://github.com/radical-cybertools/radical.pilot
don't exit on unit failure - only pilot failure
Marks suggestion fixed #335
Work on BoT example. Added various tips and pointers for the users.
working BoT tutorial
updated tutorial examples
slightly more explicit instructions
Merge branch 'master' into devel

Conflicts:
	src/radical/pilot/agent/radical-pilot-agent-multicore.py