Help: Update Qt4 documentation.

Remove independent doc listing for Qt4ConfigurationSettings, Qt4Macros
and UseQt4. These are implementation details.

Recommend the use of IMPORTED targets.

Remove references to the UseQt4 file, which is obsolete in light of
the IMPORTED targets.

Add documentation for automatic tool invocation and options.

Remove reference to variables which should not be needed in modern
implementations.
Kate: use cmMakefile::GetSafeDefinition() for a not-required variable

...otherwise the generator failed in embedded projects via
externalproject(), since there CMAKE_KATE_MAKE_ARGUMENT is not set.
Using GetSafeDefinition() is good enough to protect against
NULL-pointers.

Alex
OS X: Use 'uname -m' for processor (#14712)

In commit 2412d9bc (Use 'uname -m' for processor on Cygwin, 2010-09-21)
it was pointed out that POSIX requires 'uname -m' but not 'uname -p':

  http://www.opengroup.org/onlinepubs/9699919799/utilities/uname.html

On OS X x86_64, 'uname -p' returns i386 while 'uname -m' returns x86_64.
Since the latter is the POSIX-compliant option trust its value.
However, on OS X ppc, 'uname -m' returns 'Power Macintosh' so add a
special-case to convert that to 'powerpc'.
Merge topic 'update-qt4-docs'

f81e67c6 Help: Update Qt4 documentation.
Merge topic 'KateDontRequireVariable'

e02cdba0 Kate: use cmMakefile::GetSafeDefinition() for a not-required variable
Tests/RunCMake: Move documentation to a README.rst
Tests/RunCMake: Add function to run a specified command-line

Add a 'run_cmake_command' function that can be used by tests to run a
given command-line and check the results rather than always running a
CMake configuration process.  This can be used in the future to test
'cmake -E' for example.
cmake: Improve '-E create_symlink' edge case handling (#14713)

The logic added by commit ffc0b5e4 (Overwrite the symlink if it already
exists, 2007-02-15) does not recognize and remove existing broken links
before replacing them.  Improve the logic to remove any existing
destination file or link (but not directory).  On failure, report an
error message explaining why the existing path could not be removed or
the new one could not be created.

Add a RunCMake.CommandLine test to cover 'cmake -E' cases.  Start with
test cases covering 'cmake -E create_symlink' behavior on UNIX platforms.
CMake Nightly Date Stamp
Merge topic 'osx-host-arch'

9d2a0900 OS X: Use 'uname -m' for processor (#14712)
Merge topic 'improve-Tests-RunCMake'

d4ca30ae Tests/RunCMake: Add function to run a specified command-line
392a6553 Tests/RunCMake: Move documentation to a README.rst
Merge topic 'cmake-E-symlink-replace-dangling'

e0228e2b cmake: Improve '-E create_symlink' edge case handling (#14713)
cmake: Add '-E sleep' command

Add a cmake command-line interface to provide a cross-platform 'sleep'.
Add test case to verify CMake does not re-run on first build

Extend the RunCMake.Configure with a case to verify that the CMake
configuration process does not immediately re-run the first time that
the generated build system is invoked.
Allow projects to specify extra inputs to CMake

Define a new 'CMAKE_CONFIGURE_DEPENDS' directory property that projects
can use to specify input files to the CMake configuration process.
Extend the RunCMake.Configure test to verify that the build system
re-runs CMake when this input changes.
CMake Nightly Date Stamp
CMakeDetermine*Compiler: Fix typo 'lile' => 'like'
QNX: Introduce QCC compiler id for that QNX platform compiler.

Introduce policy CMP0047 to control resetting the id for
compatibility.

De-duplicate content in the QNX platform file by including the GNU
one. QNX is a form of GNU platform.

Do not clear CMAKE_SHARED_LIBRARY_${lang}_FLAGS variables.  They
are populated again later by the Compiler/GNU.cmake file anyway.

Modify the CMAKE_CXX_COMPILE_OBJECT variable only when the QCC
compiler id is in use, and the language is CXX.  Use the QNX
recommended flag for QCC instead of the gcc compatible -x flag.

Populate new module files to handle system includes and depfiles
when using the QCC compiler.

Remove code which unsets the system include and depfiles related
variables.  When a GNU driver is used instead of the QCC one, the
appropriate flags will be used.  These variables were previously
cleared for lowest-common-denominator compatibility with both
drivers.
Merge topic 'qcc-id'

e00db59d QNX: Introduce QCC compiler id for that QNX platform compiler.
d2dea79b CMakeDetermine*Compiler: Fix typo 'lile' => 'like'
Merge topic 'cmake-E-sleep'

94389f63 cmake: Add '-E sleep' command