[adblockplus.org Anwiki to CMS migration] implement animations

[saroyanm]

Background

In Anwiki we have a special animation tag. Anwiki loads the ​animation.js script on any page that uses it.
Also, each animation has a ​xml document with animation instructions, these instructions are loaded based on the name attribute of animation tag.

What to change

adblockplus-website-converter:

1. Update the refresh-static-files script to download ​https://adblockplus.org/animation.js.
2. Update the convert.py script to process files starting with animation! in a similar way to how interfaces, pages etc are processed. Output should mostly match ​the XML served by Anwiki. (However _don't_ update image <object> tags to use data URLs, instead wrap the src URL with a call to the inline_image filter.)
3. Update the convert.py script so that animation.js is included on any page that contains an <animation> tag.

web.adblockplus.org

4. Add a filter called inline_image that takes an image path and returns a data URL of the image's contents. Be sure to allow both localised (eg static/image/example.png) and non-localised (eg locales/en/images/example.png) images.

[kzar]

Unfortunately there's more to this than copying the files over, Anwiki appears to process the XML files. For example compare the anim_addicon.xml that is ​served online to the one ​under source control.

I've updated the description accordingly.

[kzar]

​https://github.com/kzar/adblockplus-website-converter/commit/218fa07aed032b0d47254a1ff0b3a1a7dc3bdca6
​https://github.com/kzar/adblockplus-website-converter/commit/123cbdffd39e24e7cb4a920aa2473e3bc31667d2
​https://github.com/kzar/adblockplus-website-converter/commit/47e219311a02c0beed67b9fd4cebec9c7ef29cd4
​https://github.com/kzar/adblockplus-website-converter/commit/892b207c4fe24ad624bf7ffbd98b25b34fb175ec
​https://github.com/kzar/adblockplus-website-converter/commit/cd75f354ef7d23887762bb00e202aab2d4602ad6
​https://github.com/kzar/adblockplus-website-converter/commit/9df789adc834d3d22a75269c1f030a475a7645c7
​https://github.com/kzar/adblockplus-website-converter/commit/aded24bc9b782c7dc02ed4180232ee75edd247d1
​https://github.com/kzar/adblockplus-website-converter/commit/3c9c4c419727f0d7eecdd221bfe5b981e1d586bd
​https://github.com/kzar/adblockplus-website-converter/commit/35457ff57c4e6fc4d430e9b54e9022f37b7d2c03
​https://github.com/kzar/adblockplus-website-converter/commit/687d41ce4865982f652cfbe107d14dcaa122da94
​https://github.com/kzar/adblockplus-website-converter/commit/22db3fb960a8d822e1d1e5705eaaa215cca7d69a

[Ross]

Implemented and working except in IE9 (opened as #2519).

Tested by:
Checking animations work/play on the FAQ pages.

Tested on:
​https://beta.adblockplus.org/en/faq_basics#blocking

Tested with:

IE	8.0.6001	Windows XP
IE	9.0.8112	Windows 7
IE	10.0.9200	Windows 7
IE	11.0.9600	Windows 8.1
Chrome	42.0.2311.135	Windows 8.1
Opera	29.0.1795.47	Windows 8.1
Firefox	37.0.2	Windows 8.1
Safari	7.0	OSX 10.9
Chrome	42.0.3211.111	Android 4.4.2
Firefox Mobile	29.0.1	Android 4.4.2
Browser	4.4.2-15	Android 4.4.2