Bug 897830 - Part 1 - Rename "flyout" to "flyoutpanel" for clarity. r=timA

--HG--
rename : browser/metro/base/content/flyouts/aboutFlyout.js => browser/metro/base/content/flyoutpanels/AboutFlyoutPanel.js
rename : browser/metro/base/content/flyouts/flyoutUI.js => browser/metro/base/content/flyoutpanels/FlyoutPanelsUI.js
rename : browser/metro/base/content/flyouts/prefsFlyout.js => browser/metro/base/content/flyoutpanels/PrefsFlyoutPanel.js
rename : browser/metro/base/content/flyouts/syncFlyout.js => browser/metro/base/content/flyoutpanels/SyncFlyoutPanel.js
extra : rebase_source : b97f23e84ad37814d9d8476c9e41fc57c0537e06
Bug 897683 - Uplift Add-on SDK to Firefox r=me