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Create BIND 10 root logger as child of the (unused) log4cplus
root logger and create other loggers as children of that.  This
simplifies the inclusion of logger name in output messages.
Also, enhance documentation.

Added to root_logger_name.* which was renamed to the more general
logger_name.*.  Updated files to cope with revised name.  Also
uncommented some unit tests that must have been commented out
from the Makefile.am when chasing a problem as some point in the past.

On some systems, the output of "wc -l" is left-justified.  On
others (the ones on which the test fails), the output is indented.
Replacing "cut" with "awk" fixes this.

... and convert from using TEST_F to TEST.

... and correct error in previous commit.

Also add test to check that an exception is generated if there is
a failure to access a local message file.

add comment
change from unused-parameter to unused-variable
remove additional change as was not needed.

discussed on jabber
and I tested directly with clang on Mac OS X (where problem
was seen).

Change reviewed on Jabber.

The FreeBSD compiler complained that the member variable logger_
could not be constructed because the data type (log4cplus::Logger)
has no default constructor.  It is therefore initialized to point
to the log4cplus root logger (the one that is guaranteed to exist),
even though the LoggerImpl constructor may reset it immediately
afterwards.

The configure script now writes the name of the directory for
temporary files into a .h file at configure time (instead of /tmp
being assumed).

* Move reset() method to logger_manager (and _impl) and remove from the general
  logger classes.
* Correct problem whereby some messages went to stdout and some to stderr.
* Split the shell file testing into separate files, each testing one aspect of
  the logger.

Renamed the logger_support_test program to the more descriptive
(and accurate) logger_example, and separated out the different
tests into different shell scripts.

Added the file appender, which routes output to a file (appending
to a file if one exists).

The root logger name is now obtained from the global variable
accessed by get/setRootLoggerName().

Also, the console appender now provides the correct pattern.

This is the global object that controls the logging system, so
it is logical that initialization is done here instead of in the
Logger class (which controls the operation of one logger).

Added basic logger manager and its implementation, plus an untested
console appender.  Also modified logger_support_test to use that
appender and have got part way through creating a file logger test.

This only needed to be in the Makefile.am for the liblog library,
not everywhere else!