Noissue - Trace life cycle of 'CPluginClass'

Noissue - Trace life cycle of 'CPluginClass'

Add trace messages to `CPluginClass` at four points: constructor, destructor,
'SetSite(non-null)' and 'SetSite(0)'.

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Depends on the following review:
    Noissue - Add tracing function 'ToHexLiteral()'
    https://codereview.adblockplus.org/29332020/

[Eric, 2015-12-15 16:37:27]

This is how I investigated the behavior of IE calling 'CPluginClass::SetSite()'.
(Well, it's rewritten to current tip.) This data informed the recent reworking
of 'SetSite()' and the in-review rewrite of the thread -> tab map.

The hex literals in the dependent review are instrumental in correlating the
four points in the life cycle that this change set logs.

I'll be shortly using analogous methods to investigate event registration, so
that we can get that straightened out.

[Eric, 2015-12-15 17:00:36]

P.S. The current implementation of the logging functions can drop messages at
the beginning and end of the BHO lifetime. It seems to always miss the first
constructor for each process.

The new implementation based on 'ActiveQueue' does not have these deficiencies.
That's why I wrote it.

[Oleksandr, 2016-01-05 01:45:48]

I would prefer to use wstringstream in all lambda functions, but I won't insist.
LGTM.

[sergei, 2016-01-05 11:47:34]

LGTM.