Clean up and add info to .gitignore; also re-add the QtCreator CMakeL…

…ists.txt.user ignore.

.gitignore

@@ -1,23 +1,24 @@
-# Ignore files created by windows
+# Ignore image thumbnail files created by windows
 Thumbs.db
-# Ignore files created by OS X
+# Ignore Finder view option files created by OS X
 .DS_Store
 # Ignore autogenerated source files
 Source/Core/Common/Src/scmrev.h
 # Ignore files output by build
 /[Bb]uild/
 /[Bb]inary/
 /obj/
-# Ignore files created by visual studio
+# Ignore various files created by visual studio/msbuild
 *.ipch
 *.opensdf
 *.sdf
 *.suo
 *.vcxproj.user
 *.obj
+*.tlog
+# Ignore build info file created by QtCreator
+CMakeLists.txt.user
 # Ignore files created by posix people
 *~
-# Ignore transifix configuration directory
+# Ignore transifex configuration directory
 .tx
-# Ignore tlog files
-*.tlog