Drop support for Google Reader

Google Reader is end.
https://www.google.com/reader/view/
https://www.google.com/reader/about/
http://googlereader.blogspot.com/2013/03/powering-down-google-reader.html

Close #8
Remove tombfix.xpi and update.rdf

Close #21
v0.0.8

* Drop support for Google Reader #8
* Update or fix ICON for "Photo - BRIGIT", "Photo - webshots", "Photo - Tabelog", "Video - MySpaceTV", "Photo - Ameba blog", j.mp, bit.ly #24
* Add ICON for "Photo - Kiva" #24
* Fix bugs #22 #26
* Merge 20_Tumblr.js and 20_Wedata.js into 20_model.js #16
* Rename library's script files #13
* Separate Repository() from utility.js to repository.js