latex: fix signal names to standardized (pelican-3.2 and later)

The names were accidentally reverted to pre-pelican-3.2 in
5fa7ddc0ea08d517c4a767ceaa1df6ccc4d721c "revised the latex plugin so
that it will work in both http and https protocols".
Merge pull request #93 from jedbrown/jed/fix-latex-signal-name

latex: fix signal names to standardized (pelican-3.2 and later)
Improved path handling and Pelican 3.3 support for filename placeholder.
Improve summary of interlinks plugin
Merge pull request #96 from talha131/patch-1

Improve summary of interlinks plugin
Merge pull request #95 from dflock/better_figures_and_images

Better figures and images - improved path handling & Pelican 3.3 fixes
Adds youtube liquid tag support

- Works as the existing [octopress / jekyll plugin](https://gist.github.com/jamieowen/2063748)
Merge pull request #98 from nt3rp/add-youtube-liquid-tag

Add support for YouTube to Liquid Tags plugin
update readme with requirements

better_figures_and_images doesn't make it clear in the readme what
requirements are required.
Merge pull request #99 from fly/better_requirements

update better_figures_and_images readme with requirements
added the ability to override\force related_posts from the post's meta data
Merge pull request #102 from Shaked/master

Override related_posts from post metadata
Update sitemap plugin to place nicely with modified metadata

modified is a string in pelican <= 3.3 and datetime > 3.3

Sitemap used to treat it as string.
Merge pull request #103 from talha131/fix-sitemap

Update sitemap plugin to play nicely with modified metadata
Refactor and fix minor typo in sitemap code
Merge pull request #104 from talha131/cleanup-sitemap

Refactor and fix minor typo in sitemap code
Minify JSON to improve search speed
Merge pull request #105 from talha131/minify-json

Minify JSON to improve search speed
Use THEME_STATIC_DIR instead of hardcoded 'theme'

The output folder for the theme can be changed via `THEME_STATIC_DIR` setting. But the assets plugin uses the harcoded `theme` string. This small patch makes the asset plugin use the setting.
Merge pull request #107 from graffic/patch-1

Use THEME_STATIC_DIR instead of hardcoded 'theme'