added plugin descriptions table
[pelican_comment_system] Properly encode metadata

Related to #235
Merge pull request #237 from arty-name/descriptions

Add plugin descriptions table to README
fix invalid name for __init__.py & add unicode_literals import
Make touch plugin touch files with lists
Merge pull request #240 from idyedov/update_disqus_static

fix disqus_static plugin
Fixed: Gzip header should not contain filename. This causes error with some clients.
Merge pull request #238 from Scheirle/pcs_fix_unicode

[pelican_comment_system] Properly encode metadata
Merge pull request #241 from arty-name/touch-lists

Make touch plugin touch files with lists
Merge pull request #243 from erfaan/master

Fixed: Gzip header should not contain filename. This causes error with some clients.
[pelican_comment_system] Allow reStructuredText comments.

- Changes to use a slug instead of an ID to identify comments.
- Requires updates to both themes and comment files.
- PELICAN_COMMENT_SYSTEM_DIR is now relative to PATH.
Merge pull request #236 from clokep/rst-comments

pelican_comment_system: Allow restructedtext comments.
PEP8