Number of fixes

- Saved some build time by running loop through current post’s category not all posts
- Better filtering for entries that could require code highlighting
- Grid visible by default
- Better watch options (less files watched)
- Shrink for style watcher
- Trailing EOF

Bookmarklet for grid
```
javascript:(function(){var grid=document.getElementById('grid');if(!grid){document.body.innerHTML+='<div id=grid><div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div></div></div>'}})();
```
In this case `page.category` could be only single, here I’m using `category` field predefined in [_config.yml](https://github.com/operasoftware/devopera/blob/master/_config.yml#L23) based on file location.

```
/articles/_posts/2014-01-01-post.md
    page.category — 'articles'
    page.categories — ['articles']
/articles/ja/_posts/2014-01-01-post.md
    page.category — 'articles' // based on config
    page.categories — ['articles', 'ja'] // based on folders
```