Remove unnecessary content from AnnoTabe.crx

AnnoTabe.crx contains (a previous version of) itself **nine** times. Removing this makes the file significantly smaller.

Additionally, some extra space can be saved by compressing PNG images (I've used TruePNG).

AnnoTabe.crx was compressed with 7-Zip with maximal (_Ultra_) compression.

This saves *148&thinsp;686* bytes, or **88.3%** of the file size.