Create new, a little bit better structured configuration

* Group configuration by package, and only then by language mode
* Slim down all the languages

languages/sql.el

@@ -1,47 +0,0 @@
-;;; SQL -- summary
-;;; Commentary:
-
-;;; Code:
-
-;;========== Editor config =========================
-(defun editor-config-sql ()
-  "Setup editor for SQL."
-  (set-indent 4)
-  (set-width-120))
-
-;;========== Company config =========================
-(defun completion-config-sql ()
-  (company-mode 1)
-  (flycheck-mode 1)
-
-  (set (make-local-variable 'company-backends)
-       '(company-yasnippet company-etags company-dabbrev-code company-capf
-                           company-files)))
-
-;;========== Hooks =========================
-(add-hook 'sql-mode-hook 'editor-config-sql)
-(add-hook 'sql-mode-hook 'completion-config-sql)
-
-(require 'sql-indent)
-
-;;========== Functions =====================
-(defun sql-indent-string ()
-  "Indents the string under the cursor as SQL."
-  (interactive)
-  (save-excursion
-    (er/mark-inside-quotes)
-    (let* ((text (buffer-substring-no-properties (region-beginning) (region-end)))
-           (pos (region-beginning))
-           (column (progn (goto-char pos) (current-column)))
-           (formatted-text (with-temp-buffer
-                             (insert text)
-                             (delete-trailing-whitespace)
-                             (sql-indent-buffer)
-                             (replace-string "\n" (concat "\n" (make-string column (string-to-char " "))) nil (point-min) (point-max))
-                             (buffer-string))))
-      (delete-region (region-beginning) (region-end))
-      (goto-char pos)
-      (insert formatted-text))))
-
-
-;;; sql.el ends here.