Profiler API

Realisation of Profiler agent.
Implemented:
Profiler.enable
Profiler.disable
Profiler.star
Profiler.stop
Profiler.getProfileHeaders
Profiler.getCPUProfile
Profiler.removeProfile
Profiler.clearProfiles
Profiler.addProfileHeader
Profiler.setRecordingProfile
Profiler.resetProfiles

Related: #185
- reword to `Update to 0.11.13 or newer to get full support.`
- include the description of what does "partial support" mean, so that the user knows what to expect and what to report as a bug