Merge 3 branchs

Jan 22, 2013
	jani 	Removed HAVE_MB_STRING code (PHP 5.4-incompatible)
Mar 30, 2013
	blino 	Fix saving sessions in PHP 5.4 with user session handlers (fix #12)
Jul 14, 2013
	jhg 	Merge pull request #1 from blino/master
Aug 23, 2013
	tm1000 	Merge pull request #2 from blino/master
	tm1000 	Merge pull request #1 from jani/patch-1
Sep 04, 2013
	jani 	Removed HAVE_MB_STRING code (PHP 5.4-incompatible)
	blino 	Fix saving sessions in PHP 5.4 with user session handlers (fix #12)
Sep 09, 2013
	sjorek 	implemented logging and optional termination of existence check via f…
	sjorek 	implemented logging and optional termination of existence check via f…
	sjorek 	Merge branch 'feature-fn-exists-log-and-terminate'
	sjorek 	implemented logging and optional termination of existence check via f…
	sjorek 	Merge branch 'feature-fn-exists-log-and-terminate'
	sjorek 	implemented logging and optional termination of existence check via f…
	sjorek 	Merge branch 'feature-fn-exists-log-and-terminate'
	sjorek 	implemented logging and optional termination of existence check via f…
	sjorek 	Merge branch 'feature-fn-exists-log-and-terminate'
	sjorek 	implemented logging and optional termination of existence check via f…
	sjorek 	Merge branch 'feature-fn-exists-log-and-terminate'
	sjorek 	implemented logging and optional termination of existence check via f…
	sjorek 	Merge branch 'feature-fn-exists-log-and-terminate'
	sjorek 	added a proper description to Changelog
	sjorek 	Merge branch 'feature-fn-exists-log-and-terminate'
Sep 10, 2013
	sjorek 	updated descriptions of both 'exists_forbidden'-flags, to make clear …
	sjorek 	Merge branch 'feature-fn-exists-log-and-terminate'
	sjorek 	updated descriptions of both 'exists_forbidden'-flags, to make clear …
	sjorek 	Merge branch 'feature-fn-exists-log-and-terminate'
	sjorek 	updated descriptions of both 'exists_forbidden'-flags, to make clear …
	sjorek 	Merge branch 'feature-fn-exists-log-and-terminate'
	sjorek 	updated descriptions of both 'exists_forbidden'-flags, to make clear …
	sjorek 	Merge branch 'feature-fn-exists-log-and-terminate'