Bulk (mostly documentation) update

 - Remove PHP version from license notices
 - Bump year number in copyright notices
 - Recommend PHP 5.4 or newer to be used
 - Tell Travis-CI to test on PHP 5.3.0 instead of the latest 5.3 version

Related: #3450
diff --git a/system/language/english/calendar_lang.php b/system/language/english/calendar_lang.php
index e1dc67f..b95b36e 100644
--- a/system/language/english/calendar_lang.php
+++ b/system/language/english/calendar_lang.php
@@ -2,11 +2,11 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 5.2.4 or newer
+ * An open source application development framework for PHP
  *
  * This content is released under the MIT License (MIT)
  *
- * Copyright (c) 2014, British Columbia Institute of Technology
+ * Copyright (c) 2014 - 2015, British Columbia Institute of Technology
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -29,7 +29,7 @@
  * @package	CodeIgniter
  * @author	EllisLab Dev Team
  * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/)
- * @copyright	Copyright (c) 2014, British Columbia Institute of Technology (http://bcit.ca/)
+ * @copyright	Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
  * @license	http://opensource.org/licenses/MIT	MIT License
  * @link	http://codeigniter.com
  * @since	Version 1.0.0
@@ -37,51 +37,51 @@
  */
 defined('BASEPATH') OR exit('No direct script access allowed');
 
-$lang['cal_su']			= 'Su';
-$lang['cal_mo']			= 'Mo';
-$lang['cal_tu']			= 'Tu';
-$lang['cal_we']			= 'We';
-$lang['cal_th']			= 'Th';
-$lang['cal_fr']			= 'Fr';
-$lang['cal_sa']			= 'Sa';
-$lang['cal_sun']		= 'Sun';
-$lang['cal_mon']		= 'Mon';
-$lang['cal_tue']		= 'Tue';
-$lang['cal_wed']		= 'Wed';
-$lang['cal_thu']		= 'Thu';
-$lang['cal_fri']		= 'Fri';
-$lang['cal_sat']		= 'Sat';
-$lang['cal_sunday']		= 'Sunday';
-$lang['cal_monday']		= 'Monday';
-$lang['cal_tuesday']	= 'Tuesday';
-$lang['cal_wednesday']	= 'Wednesday';
-$lang['cal_thursday']	= 'Thursday';
-$lang['cal_friday']		= 'Friday';
-$lang['cal_saturday']	= 'Saturday';
-$lang['cal_jan']		= 'Jan';
-$lang['cal_feb']		= 'Feb';
-$lang['cal_mar']		= 'Mar';
-$lang['cal_apr']		= 'Apr';
-$lang['cal_may']		= 'May';
-$lang['cal_jun']		= 'Jun';
-$lang['cal_jul']		= 'Jul';
-$lang['cal_aug']		= 'Aug';
-$lang['cal_sep']		= 'Sep';
-$lang['cal_oct']		= 'Oct';
-$lang['cal_nov']		= 'Nov';
-$lang['cal_dec']		= 'Dec';
-$lang['cal_january']	= 'January';
-$lang['cal_february']	= 'February';
-$lang['cal_march']		= 'March';
-$lang['cal_april']		= 'April';
-$lang['cal_mayl']		= 'May';
-$lang['cal_june']		= 'June';
-$lang['cal_july']		= 'July';
-$lang['cal_august']		= 'August';
-$lang['cal_september']	= 'September';
-$lang['cal_october']	= 'October';
-$lang['cal_november']	= 'November';
-$lang['cal_december']	= 'December';
+$lang['cal_su'] = 'Su';
+$lang['cal_mo'] = 'Mo';
+$lang['cal_tu'] = 'Tu';
+$lang['cal_we'] = 'We';
+$lang['cal_th'] = 'Th';
+$lang['cal_fr'] = 'Fr';
+$lang['cal_sa'] = 'Sa';
+$lang['cal_sun'] = 'Sun';
+$lang['cal_mon'] = 'Mon';
+$lang['cal_tue'] = 'Tue';
+$lang['cal_wed'] = 'Wed';
+$lang['cal_thu'] = 'Thu';
+$lang['cal_fri'] = 'Fri';
+$lang['cal_sat'] = 'Sat';
+$lang['cal_sunday'] = 'Sunday';
+$lang['cal_monday'] = 'Monday';
+$lang['cal_tuesday'] = 'Tuesday';
+$lang['cal_wednesday'] = 'Wednesday';
+$lang['cal_thursday'] = 'Thursday';
+$lang['cal_friday'] = 'Friday';
+$lang['cal_saturday'] = 'Saturday';
+$lang['cal_jan'] = 'Jan';
+$lang['cal_feb'] = 'Feb';
+$lang['cal_mar'] = 'Mar';
+$lang['cal_apr'] = 'Apr';
+$lang['cal_may'] = 'May';
+$lang['cal_jun'] = 'Jun';
+$lang['cal_jul'] = 'Jul';
+$lang['cal_aug'] = 'Aug';
+$lang['cal_sep'] = 'Sep';
+$lang['cal_oct'] = 'Oct';
+$lang['cal_nov'] = 'Nov';
+$lang['cal_dec'] = 'Dec';
+$lang['cal_january'] = 'January';
+$lang['cal_february'] = 'February';
+$lang['cal_march'] = 'March';
+$lang['cal_april'] = 'April';
+$lang['cal_mayl'] = 'May';
+$lang['cal_june'] = 'June';
+$lang['cal_july'] = 'July';
+$lang['cal_august'] = 'August';
+$lang['cal_september'] = 'September';
+$lang['cal_october'] = 'October';
+$lang['cal_november'] = 'November';
+$lang['cal_december'] = 'December';
 
 /* End of file calendar_lang.php */
 /* Location: ./system/language/english/calendar_lang.php */
\ No newline at end of file