Miscellaneous changes

* PHP code style fixes
* Updated database schema for upgrade

.php-cs-fixer.php

@@ -0,0 +1,48 @@
+<?php
+
+$finder = PhpCsFixer\Finder::create()
+    ->exclude('cache')
+    ->in(__DIR__)
+;
+
+return (new PhpCsFixer\Config())
+    ->setRules([
+      'binary_operator_spaces' => ['default' => 'align'],
+      'phpdoc_align' => true,
+      'array_indentation' => true,
+      'blank_line_before_statement' => ['statements' => [
+        'break', 'case', 'continue', 'default', 'exit', 'for', 'foreach', 'if']
+        ],
+      'braces' => ['position_after_control_structures' => 'next'],
+      'cast_spaces' => true,
+      'concat_space' => ['spacing' => 'one'],
+      'elseif' => true,
+      'encoding' => true,
+      'full_opening_tag' => true,
+      'include' => true,
+      'indentation_type' => true,
+      'array_syntax' => ['syntax' => 'short'],
+      'constant_case' => ['case' => 'lower'],
+      'method_chaining_indentation' => true,
+      'method_argument_space' => true,
+      'no_closing_tag' => true,
+      'no_singleline_whitespace_before_semicolons' => true,
+      'no_useless_return' => true,
+      'no_whitespace_in_blank_line' => true,
+      'not_operator_with_successor_space' => true,
+      'single_blank_line_at_eof' => true,
+      'class_definition' => ['single_line' => true],
+      'single_quote' => true,
+      'trim_array_spaces' => true,
+      'visibility_required' => true,
+      'native_function_casing' => true,
+      'no_empty_comment' => true,
+      'single_line_comment_style' => true,
+      'phpdoc_add_missing_param_annotation' => true,
+      'no_spaces_after_function_name' => true,
+      'no_spaces_around_offset' => true,
+      'no_spaces_inside_parenthesis' => true,
+    ])
+    ->setFinder($finder)
+    ->setIndent("    ")
+;