ENH: Detect/use recommended compiler flags

This patch set sets recommended compiler flags based
on detected OS/compiler evironment detection in a consistent
way.

1)----------------
Add file ITKSetStandardCompilerFlags.cmake

Wrote warning flag detection system (adapted by David Cole)
Use the check_compiler_warning_flags
function to determine at CMake time what is the set of common C and C++ compiler
warning flags supported by the current compilers. Add those warning flags to
ITK_REQUIRED_C_FLAGS and ITK_REQUIRED_CXX_FLAGS so they are enabled by default.

2)---------------
Default to CMake 2.8 CheckCXXAcceptsFlags, and removed custom itkCheckCXXAcceptsFlags.cmake version.

Converted to use the default CMake capability (which filter on compiler
options that only give warnings, and removes those also) rather than
the custom code that was only in ITK.

3)---------------
Consolodated ITKPlatformSpecificChecks.cmake consistently into ITKSetStandardCompilerFlags.cmake

Re-writing code in ITKPlatformSpecificChecks.cmake and make a more consistent
set of tools used to identify which compiler options should be used.

Issue-Ids:  ITK-145
Change-Id: Iab95e55064b69f3eee489b65a389a556db8fc65e

CMake/CTestCustom.cmake.in

@@ -93,6 +93,7 @@ SET(CTEST_CUSTOM_WARNING_EXCEPTION
   ".*[/\\\\][Mm]odules[/\\\\][Tt]hird[Pp]arty[/\\\\][Vv][Nn][Ll][/\\\\].*[Ww]arning.*"
   ".*[/\\\\][Mm]odules[/\\\\][Tt]hird[Pp]arty[/\\\\][Vv][Nn][Ll][Ii]nstantiation[/\\\\].*[Ww]arning.*"
   ".*[/\\\\][Mm]odules[/\\\\][Tt]hird[Pp]arty[/\\\\][Zz][Ll][Ii][Bb][/\\\\].*[Ww]arning.*"
+  ".*Microsoft.*include.*win.*.h.*[Ww]arning.*"
   )
 
 IF(APPLE)