Removed "Executable not found" and added dir="ltr" to an error message.
I made two changes to the error message in Timeline.php:
- Removed "Executable not found". It is not necessarily correct - the executable is EasyTimeline.pl and this message can be produced if it is found but didn't run expected.
- Added dir="ltr". It can appear in an RTL wiki, but it's always in English (which is OK), so it LTR direction should be forced.