Fix .editor and .editor.mini

1. .editor -> atom-text-editor,
              atom-text-editor::shadow {
2. .editor.mini -> atom-text-editor[mini],
                   atom-text-editor[mini]::shadow {
Fix workspace

.workspace -> atom-workspace,
              atom-workspace::shadow {
Fix pane

1. .panes -> atom-pane-axis,
             atom-pane-axis::shadow
2. .pane -> atom-pane,
            atom-pane::shadow
Fix tool panel

.tool-panel -> atom-panel,
               atom-panel::shadow {
Fix panel-bottom

.panel-bottom -> atom-panel.bottom,
                 atom-panel.bottom::shadow {
Fix overlay

.overlay -> atom-panel.modal,
            atom-panel.modal::shadow {
Clean
Fix overlays
Update readme, changelog, package.json
Fix scrollbars by adding /deep/
Fix @white-gray color from syntax