Harmonize debug output in rasdaman

[Dimitar Misev]

Right now debugging info is produced in few different ways:

• RMDebug macros (RMDBGENTER, RMDBGEXIT, etc.), very complex and allow fine grained control, but seem somewhat broken
• ENTER/LEAVE/TALK - very simple, provide indentation, but only global control is possible
• The tile cache introduces TENTER/TTALK/TLEAVE which allow to turn on ENTER/LEAVE/TALK selectively only in the tile cache
• RMInit::logOut, RMInit::dbgOut - simple output to the log, no possibility to turn off, typically used for outputing warnings/errors and other important info

These should be harmonized into a single method, which is hopefully both powerful and simple.

[Dimitar Misev]

duplicate of #903