Update 145 DOM doc links to use proper Markdown; fix 56 broken links

sdk/lib/web_sql/dart2js/web_sql_dart2js.dart

 /**
  * An API for storing data in the browser that can be queried with SQL.
  *
  * **Caution:** this specification is no longer actively maintained by the Web
  * Applications Working Group and may be removed at any time.
  * See [the W3C Web SQL Database specification](http://www.w3.org/TR/webdatabase/)
  * for more information.
  *
  * The [dart:indexed_db] APIs is a recommended alternatives.
  */
@@ skipping 85 matching lines @@
   /**
    * Atomically update the database version to [newVersion], asynchronously
    * running [callback] on the [SqlTransaction] representing this
    * [changeVersion] transaction.
    *
    * If [callback] runs successfully, then [successCallback] is called.
    * Otherwise, [errorCallback] is called.
    *
    * [oldVersion] should match the database's current [version] exactly.
    *
+   * See also:
+   *
    * * [Database.changeVersion](http://www.w3.org/TR/webdatabase/#dom-database-changeversion) from W3C.
    */
   @DomName('Database.changeVersion')
   @DocsEditable()
   void changeVersion(String oldVersion, String newVersion, [SqlTransactionCallback callback, SqlTransactionErrorCallback errorCallback, VoidCallback successCallback]) native;
 
   @DomName('Database.readTransaction')
   @DocsEditable()
   void readTransaction(SqlTransactionCallback callback, [SqlTransactionErrorCallback errorCallback, VoidCallback successCallback]) native;
 
@@ skipping 169 matching lines @@
 @deprecated // deprecated
 @Native("SQLTransaction")
 class SqlTransaction extends Interceptor {
   // To suppress missing implicit constructor warnings.
   factory SqlTransaction._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('SQLTransaction.executeSql')
   @DocsEditable()
   void executeSql(String sqlStatement, List<Object> arguments, [SqlStatementCallback callback, SqlStatementErrorCallback errorCallback]) native;
 }