database - preliminary support for sqlite

* currently sqlite is not supported cos we have a SUBSTRING function
  that we need to change
* related to https://gitlab.com/codeigniterpower/codeigniter-currencylib/-/issues/15
* related to commit 3cd0a59

Author: mckaygerhard

.gitattributes

@@ -31,3 +31,7 @@
 *.gif binary
 *.ico binary
 *.mo binary
+*.sqlite binary
+*.dbsqlite binary
+*.db binary
+

cweb/elcurrencyweb/config/database.php

@@ -82,6 +82,15 @@
 	'encrypt' => FALSE,	'compress' => FALSE,	'stricton' => FALSE,	'failover' => array(),	'save_queries' => TRUE
 );
 
+// $db['elcurrencydb'] = array(
+// 	'dsn'	=> 'sqlite:'.APPPATH.'/elcurrencydb.db',
+// 	'database' => '',
+// 	'hostname' => '',	'username' => '',	'password' => '',
+// 	'dbdriver' => 'pdo', 	'dbprefix' => '',	'pconnect' => FALSE,	'db_debug' => (ENVIRONMENT !== 'production'),
+// 	'cache_on' => FALSE,	'cachedir' => '',	'char_set' => 'utf8',	'dbcollat' => 'utf8_general_ci',	'swap_pre' => '',
+// 	'encrypt' => FALSE,	'compress' => FALSE,	'stricton' => FALSE,	'failover' => array(),	'save_queries' => TRUE
+// );
+
 $db['default'] = $db['elcurrencydb'];
 // db default is at the end, after definition of "elsistemadb"