Merge pull request #89 from ovaris/master

Expose ImageCachePreloader

set version to 1.4.0

Merge pull request #38 from sladkoff/master

Allow changing the cache root directory

Merge pull request #41 from calvium/expose-generateCacheKey

Export getCachedImageFilePath

Merge pull request #28 from hhravn/patch-1

Update README.md