Fix #590, #589.

Unified wording Calibre-Web
Replaced one table on admin page, deleted password column
Removed spaces on layout page
Removed uesless commit calls during db migration
Implementation of registering by email

cps/templates/book_edit.html

@@ -154,7 +154,7 @@
   <div class="modal-dialog">
     <div class="modal-content">
       <div class="modal-header bg-danger text-center">
-          <span>{{_('Are really you sure?')}}</span>
+          <span>{{_('Are you really sure?')}}</span>
       </div>
         <div class="modal-body text-center">
           <span>{{_('Book will be deleted from Calibre database')}}</span>
@@ -239,7 +239,7 @@
   var i18nMsg = {
     'loading': {{_('Loading...')|safe|tojson}},
     'search_error': {{_('Search error!')|safe|tojson}},
-    'no_result': {{_('No Result! Please try anonther keyword.')|safe|tojson}},
+    'no_result': {{_('No Result(s) found! Please try aonther keyword.')|safe|tojson}},
     'author': {{_('Author')|safe|tojson}},
     'publisher': {{_('Publisher')|safe|tojson}},
     'description': {{_('Description')|safe|tojson}},