Move Copy_File from implementation unit Ada.Directories.Inside to new implementation unit Ada.Directories.Inside.Do_Copy_File
Change implementation unit Ada.Directories.Inside.Do_Copy_File to procedure
Separate implementation parts for POSIX platform from Ada.Directories
Reorder
Use Raise_Exception_From_Here
Reformat
Improve Ada.Directories
Rename and promote implementation unit Ada.Directories.Inside.File_Systems to extended unit Volumes
Add file system functions into Ada.Directories.Volumes
Implement units in directories directory for Linux
Reformat
Merge branch 'master' (gcc-4.7, commit '72056cc') into gcc-4.6

Conflicts:
	source/s-stposu.adb (deleted)
	source/sjlj/s-unrase.adb
	source/zcx/s-unrase.adb