2014-02-25  Robert Dewar  <dewar@adacore.com>

	* binde.adb: Change messages to mention -gnatel instead of -gnatwl.
	* gnat_ugn.texi: Update documentation of -gnatwl Add documentation
	of -gnatel/-gnateL.
	* opt.ads (Warn_Info_Messages): New flag.
	* sem_elab.adb: Use Elab_Warnings, Elab_Info_Messages to control
	messages.
	* sem_prag.adb: Use Elab_Warnings, Elab_Info_Messages to control
	messages.
	* switch-m.ad, switch-c.adb: Recognize new -gnatel/EL switches.
	* usage.adb: Add documentation of -gnatel/-gnateL Update
	documentation of -gnatwl/-gnatwL.
	* warnsw.adb: New handling of Elab_Warnings, Elab_Info_Messages
	* warnsw.ads (Elab_Info_Messages): New field in Warning_Record

From-SVN: r208139