Small error - object fs does not exist in this code example

temporarily use EPNP in SolvePnP instead of UPNP or DLS algorithms, since the latter two are not quite stable

Trying to fix whitespace issue.
This reverts commit dcc2512f.

added a check to prevent illegal access to operator[] when vector is empty

Removed check on limits.  A common use of HoughLines would be to restrict theta to be between a small negative number and a small positive number, e.g. -pi/16 to pi/16.  This wasn't possible with the previous checks.

made the solvepnp a bit more modest; test 5-point configuration instead of 4-point in some cases; reduce the noise in 4-point configurations in other cases

Moved out of TLS to properly collect data from different threads;
Concurrent access guards were added to collection functions;

REG_NONE defined in ml.hpp conflicts with defined in Winnt.h