Minor clean up of .gitignore

.gitignore

+# backup files
 *~
-*.pyc
 .*.swp
 
-build.*.log
-Makefile
-NMake
-install.*.history
-setup.*
-cleanup.*
-version.cmt
-genConf/
-QMTest/
+# build products
 InstallArea/
-patches/
-test_results/
 
-*-slc[56]-*/
-i686-winxp-vc9-dbg/
+# Centrally managed files and helpers
+cache_preload.cmake
 
-.*-slc[56]-*.d/
-.i686-winxp-vc9-dbg.d/
+# CMake temporary files
+build*/
+.build/
+CMakeFiles/
+CTestTestfile.cmake
+CPackSourceConfig.cmake
+CPackConfig.cmake
+cmake_install.cmake
 
+# common byproducts
+*.pyc
+*.pyo
 DoxyWarnings.log
 .gdb_history
 *.new
+.coverage
+*.patch
 *.launch
 *.launch.py
 *.launch.opts
 
+# QMTest byproducts
+**/tests/qmtest/*
+!**/tests/qmtest/*.qms
+!**/tests/qmtest/*.qmt
+
+# Metadata used by IDEs
+# - Eclipse
 .project
 .cproject
 .settings
 .pydevproject
-.vscode
-
-.build/
-build-dir/
-build.*/
 .eclipse/
-CMakeFiles/
-CTestTestfile.cmake
-CPackSourceConfig.cmake
-CPackConfig.cmake
-cmake_install.cmake
-GaudiConfig.cmake
-GaudiConfigVersion.cmake
-Gaudi/ChangeLog
-GaudiAlg/ChangeLog
-GaudiAud/ChangeLog
-GaudiCommonSvc/ChangeLog
-GaudiCoreSvc/ChangeLog
-GaudiExamples/ChangeLog
-GaudiGSL/ChangeLog
-GaudiKernel/ChangeLog
-GaudiMonitor/ChangeLog
-GaudiMP/ChangeLog
-GaudiPartProp/ChangeLog
-GaudiPolicy/ChangeLog
-GaudiProfiling/ChangeLog
-GaudiPython/ChangeLog
-GaudiRelease/ChangeLog
-GaudiSvc/ChangeLog
-GaudiSys/ChangeLog
-GaudiUtils/ChangeLog
-PartPropSvc/ChangeLog
-RootCnv/ChangeLog
-RootHistCnv/ChangeLog
-ChangeLog
+# - QtCreator
+CMakeLists.txt.user
+# - VSCode
+.vscode/