bump crengine: tables rendering improvements and others (#772)
bump crengine: tables rendering improvements and others (#772)

bump crengine, which includes:
- Adds support for symbol fonts (local or embedded)
- Fix some issues when rendering text in constrained width
- Page splitting: fix possible missing blocks
- CSS: adds support for 'auto', ignore % for borders
- Fix right border drawing position
- Fix: adds missing properties in copystyle()
- Adds comments, erm_killed rendering method
- Adds getRenderedWidths(): get node min/max node content width
- Tables rendering: fixes and improvements
- getRenderedWidths: enable min_width to be a single CJK char
- Fix wrong text wrap avoid in some case
- epub.css: add style for 'blockquote'
NiLuJe/koreader-base,NiLuJe/koreader-base,koreader/koreader-base,houqp/koreader-base,NiLuJe/koreader-base,Frenzie/koreader-base,NiLuJe/koreader-base,Frenzie/koreader-base,Frenzie/koreader-base,houqp/koreader-base,koreader/koreader-base,koreader/koreader-base,Frenzie/koreader-base,houqp/koreader-base,houqp/koreader-base,koreader/koreader-base