Bug 1019669 - Flatten project editor plugin folder structure;r=harth

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rename : browser/devtools/projecteditor/lib/plugins/app-manager/lib/app-project-editor.js => browser/devtools/projecteditor/lib/plugins/app-manager/app-project-editor.js
rename : browser/devtools/projecteditor/lib/plugins/app-manager/lib/plugin.js => browser/devtools/projecteditor/lib/plugins/app-manager/plugin.js
rename : browser/devtools/projecteditor/lib/plugins/delete/lib/delete.js => browser/devtools/projecteditor/lib/plugins/delete/delete.js
rename : browser/devtools/projecteditor/lib/plugins/dirty/lib/dirty.js => browser/devtools/projecteditor/lib/plugins/dirty/dirty.js
rename : browser/devtools/projecteditor/lib/plugins/image-view/lib/image-editor.js => browser/devtools/projecteditor/lib/plugins/image-view/image-editor.js
rename : browser/devtools/projecteditor/lib/plugins/image-view/lib/plugin.js => browser/devtools/projecteditor/lib/plugins/image-view/plugin.js
rename : browser/devtools/projecteditor/lib/plugins/logging/lib/logging.js => browser/devtools/projecteditor/lib/plugins/logging/logging.js
rename : browser/devtools/projecteditor/lib/plugins/new/lib/new.js => browser/devtools/projecteditor/lib/plugins/new/new.js
rename : browser/devtools/projecteditor/lib/plugins/save/lib/save.js => browser/devtools/projecteditor/lib/plugins/save/save.js
rename : browser/devtools/projecteditor/lib/plugins/status-bar/lib/plugin.js => browser/devtools/projecteditor/lib/plugins/status-bar/plugin.js