Bug 912057 - Replace Browser Debugger with Browser Toolbox. r=past

--HG--
rename : browser/devtools/debugger/DebuggerProcess.jsm => browser/devtools/framework/ToolboxProcess.jsm
Bug 940617 - "Recently closed tabs" list should exclude tabs with about: URIs as the only history entry. r=ttaubert
Bug 942946 - ESC closes Responsive Design Mode while opening Web Console split view. r=paul
Bug 944073 - Replace Components.returnCode with Components.Exception in SessionStore.jsm. r=Yoric
Bug 944871 - Add localization comment to "Firefox Touch" string. r=bbondy