Catch exceptions in sitkShowTest

If any of the ReadImage or Show calls fail in sitkShowTest, it now
catches the exception and prints a message.  Previously the exceptions
were not handled and the program aborted.

Also, I removed a debugging message in sitkShow.cxx for Release builds.

Change-Id: Ifcf3b28c97b67248dca00e355d675bd681d29f68
COMP: ITK with FFTW would generate a link error

This patch addressed the following link error:

Linking CXX executable ../bin/BufferImportExport
ld: library not found for -lfftw3
Merge topic 'FixFFTWLinkError'

a8933ae COMP: ITK with FFTW would generate a link error
Adding required documentation to installation

Forming a list of important documents which should be installed with
SimpleITK. This includes the LICENSE, NOTICE and readme files from
SimpleITK. Additionaly, these are places into a CMake list for
convenience.
Add important documents to python package
Skip RBUILD path for shared libraries.

Disable using build directory RPATH for SimpleITK shared
libraries. Since, the language shared libraries are not cleaned up by
removing their build dir rpaths. We must not actually set the rpath,
so that the libraries will be free of references to the build tree.
Correct python list for document strings

Windows and Unix need to have differently quoted string to be passed
to CMake for the build time configuration, also the paths need to be
converted to the native formatt.
Use SimpleITK's version for doc install path
Get important ITK documents to be install with SimpleITK
Merge topic 'AddImportantDocsToInstall'

5e79424 Get important ITK documents to be install with SimpleITK
88672e6 Use SimpleITK's version for doc install path
9134b77 Correct python list for document strings
32fc640 Add important documents to python package
651f8ec Adding required documentation to installation
Merge topic 'CatchExceptionsInShowTest'

e53fb0a Catch exceptions in sitkShowTest
ENH: improving python egg version to use PEP386

The version should be consistent and sequential along the release and
master branches. A comparison is made between the version recoreded in
CMake and the version of the most recent tag. If there are the same
then the "post" suffix is used other wise the "dev" suffix is
used. dev meanin that we are working towards, where as "post" we are
patching away from.

In the future it would be good to detect which branch is the HEAD is
currently at and special case this.
COMP: require cmake 2.8.1 and it's policies

Upgraded the required version of CMake to use the new CMP0015. This
prevents a warning introduced in cmake 2.8.8-rc1.
Merge topic 'FixFFTWLinkError'

7bc206b COMP: require cmake 2.8.1 and it's policies
Merge topic 'NoRPathForLibraries'

c8b2253 Skip RBUILD path for shared libraries.
Merge topic 'AddPEP386Version'

99ebaaf ENH: improving python egg version to use PEP386
Updating superbuild SWIG version to 2.0.6

This is needed to fix a bug with i386 archs on macs.
Fix numeric trucation for 32-bit integers.
Updating version to 0.6.0 for development
Merge topic 'UpdateVersionForDevelopment'

bdfdfb1 Updating version to 0.6.0 for development