improve / fix postgres support.

laravel/database/schema/grammars/postgres.php

@@ -324,7 +324,7 @@ class Postgres extends Grammar {
 	 */
 	protected function type_integer(Fluent $column)
 	{
-		return ($column->increment) ? 'SERIAL' : 'INTEGER';
+		return ($column->increment) ? 'SERIAL' : 'BIGINT';
 	}
 
 	/**

laravel/database/schema/table.php

@@ -136,7 +136,9 @@ class Table {
 		// the index that can be used when dropping indexes.
 		if (is_null($name))
 		{
-			$name = $this->name.'_'.implode('_', $columns).'_'.$type;
+			$name = str_replace(array('-', '.'), '_', $this->name);
+
+			$name = $name.'_'.implode('_', $columns).'_'.$type;
 		}
 
 		return $this->command($type, compact('name', 'columns'));