some DDG helper functions renamed WIP

sed script
```
s/\([{#\/]\)strip_html/\1stripHTML/g
s/\([{#\/]\)get_image_url/\1getImageURL/g
s/\([{#\/]\)image_redirect/\1imageProxy/g
s/\([{#\/]\)get_asset_path/\1getAssetPath/g
s/\([{#\/]\)parse_link_url/\1linkURL/g
s/\([{#\/]\)parse_link_text/\1linkText/g
s/\([{#\/]\)trim_spaces/\1trim/g
s/\([{#\/]\)countem/\1length/g
s/\([{#\/]\)enough_expand/\1enoughExpand/g
s/\([{#\/]\)getDomain/\1domain/g
s/\([{#\/]\)userURL/\1videos_userURL/g
s/\([{#\/]\)checkMusic/\1videos_checkMusic/g
s/\([{#\/]\)formatViews/\1videos_formatViews/g
s/\([{#\/]\)embedURL/\1videos_embedURL/g
s/\([{#\/]\)playURL/\1videos_playURL/g
s/\([{#\/]\)checkStatistics/\1videos_checkStatistics/g
s/\([{#\/]\)shortenTime/\1news_shortenTime/g
```