2.3.0-beta2

[#22] Allow for thumbnails to preserve basename of file being thumbna…

…iled

Fix issues with url prefixing in 1.3.1; closes #36, #34

Update build version

[#29] Fix issue with caching of thumbnails always being forced

Update build version

- [#14] Cloak path of generated thumbnail to prevent linking to sourc…

…e image; [#20] Added phpthumbof.cache_path setting for overriding the default cache path

[#12] Fix issue where multiple fltr calls were not working, allow par…

…ameters with [] in their names

Update changelog