STYLE: Cleanup include( ${ITK_USE_FILE} ) and minor alignements

Some files had a superfluous if( ${ITK_FOUND} ) check for include( ${ITK_USE_FILE} )
All the includes were realigned the same way as in the CreateNewExample.py.in file,
to be consistent throughout the whole project
Some misaligned Code.cxx lines were also cleaned up.

Change-Id: Ifa38d49415dc2949546897f234d20be575048bec
Merge "STYLE: Cleanup include( ${ITK_USE_FILE} ) and minor alignements"