Spacemacs config updates

- Disable lazy loading of layers, because it seems to be broken
- Disable progress bar for faster startup
- Enable line numbers
- Enable server at startup
- Auto-delete trailing whitespace on changed lines when saving

spacemacs

@@ -69,7 +69,7 @@ This function should only modify configuration layer settings."
    ;; installation feature and you have to explicitly list a layer in the
    ;; variable `dotspacemacs-configuration-layers' to install it.
    ;; (default 'unused)
-   dotspacemacs-enable-lazy-installation 'unused
+   dotspacemacs-enable-lazy-installation 'nil
 
    ;; If non-nil then Spacemacs will ask for confirmation before installing
    ;; a layer lazily. (default t)
@@ -319,7 +319,7 @@ It should only modify the values of Spacemacs settings."
    ;; If non-nil a progress bar is displayed when spacemacs is loading. This
    ;; may increase the boot time on some systems and emacs builds, set it to
    ;; nil to boost the loading time. (default t)
-   dotspacemacs-loading-progress-bar t
+   dotspacemacs-loading-progress-bar nil
 
    ;; If non-nil the frame is fullscreen when Emacs starts up. (default nil)
    ;; (Emacs 24.4+ only)
@@ -373,7 +373,7 @@ It should only modify the values of Spacemacs settings."
    ;;                       text-mode
    ;;   :size-limit-kb 1000)
    ;; (default nil)
-   dotspacemacs-line-numbers nil
+   dotspacemacs-line-numbers t
 
    ;; Code folding method. Possible values are `evil' and `origami'.
    ;; (default 'evil)
@@ -395,7 +395,7 @@ It should only modify the values of Spacemacs settings."
 
    ;; If non-nil, start an Emacs server if one is not already running.
    ;; (default nil)
-   dotspacemacs-enable-server nil
+   dotspacemacs-enable-server t
 
    ;; Set the emacs server socket location.
    ;; If nil, uses whatever the Emacs default is, otherwise a directory path
@@ -441,7 +441,7 @@ It should only modify the values of Spacemacs settings."
    ;; `trailing' to delete only the whitespace at end of lines, `changed' to
    ;; delete only whitespace for changed lines or `nil' to disable cleanup.
    ;; (default nil)
-   dotspacemacs-whitespace-cleanup nil
+   dotspacemacs-whitespace-cleanup 'changed
 
    ;; Either nil or a number of seconds. If non-nil zone out after the specified
    ;; number of seconds. (default nil)