Nicer Delphi .gitignore

- added header with link to official documentation about Delphi filetypes
- added some missed file extensions
- made some grouping with descriptions

Delphi.gitignore

-*.dcu
-*.~*
-*.local
-*.identcache
-__history
-*.drc
-*.map
+# .gitignore template for Delphi projects
+# Based on Embarcadero documentation:
+# http://docwiki.embarcadero.com/RADStudio/XE5/en/File_Extensions_of_Files_Generated_by_RAD_Studio
+
+# Delphi compiler-generated binaries
 *.exe
 *.dll
 *.bpl
 *.dcp
 *.so
 *.apk
+*.drc
+*.map
+*.res
+*.dres
+*.rsm
+*.tds
+*.tlb
+
+# Delphi autogenerated files (duplicated info)
+*.cfg
+*Resource.rc
+
+# Delphi local files (user-specific info)
+*.local
+*.identcache
+*.projdata
+*.tvsconfig
+*.dsk
+*.deployproj
+*.vlb
+
+# Delphi history and backups
+__history/
+*.~*