Merge pull request #17 from mbw2001/master

Imageproxy code improvements and cleanup
Updated gitignore

ignore _site folder generated by jekyll for github pages
xbmc-notify icon
imageProxy check file extention

Close #20
ImageProxy check file incl. extention

Issue #20
ImageProxy Hash include opacity

Image resized cache check ignores opacity. Requesting same
image-dimensions but different opacity was not possible. image
thumbnail filename now includes opacity
XbmcImageProxy use jpg

Use jpeg images instead of png. Png alpha channel is not actually used.
jpeg is smaller in filesize, improving response time. Close #21
Tvshow image placeholder

Show image holder if no image is available for tvshow.
tvshow image title

Add title caption to tvshow, displaying full show title