Updated all plugins that are non-forked. Added some new plugins.

Added update_plugins.py which can fetch new plugins from GitHub.

New plugins added: zencoding, vim-indent-object, taglist, nginx.vim

sources_non_forked/vim-snippets/README.md

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+IMPORTANT: comment on: [What about merging whith Ultisnip using its engine](https://github.com/garbas/vim-snipmate/issues/114)
+
+Snipmate & UltiSnip Snippets
+============================
+
+This repository contains snippets files for various programming languages.
+
+It is community-maintained and many people have contributed snippet files and other
+improvements already.
+
+Contents
+========
+
+    snippets/*: snippets using snipmate format
+    UltiSnips/*: snippets using UltiSnips format
+
+Snippet engines
+===============
+
+There are different forks of snippet engines which allow the user to insert
+sippets by typing the name of a snippet hitting the expansion mapping.
+
+    garbas/vim-snipmate [4]:
+      VimL, snipmate-snippets, engine sometimes behaves strange, supports
+      rewriting snippets on the fly (eg adding a second version with folding
+      markers)
+
+    MarcWeber/UltiSnips [6]:
+      python, snipmate-snippets and UltiSnips-snippets
+
+    SirVer/ultisnips [7]:
+      python, UltiSnips-snippets
+
+    github.com/Shougo/neosnippet [5]:
+      viml, has a compatible mode allowing to reuse most snipmate snippets ?
+
+    XPTemplate:
+      totally different syntax, does not read snippets contained in this file,
+      but it is also very powerful
+
+    ... there are some more, but they have less features which is why I don't
+    mention them here
+
+UltiSnips engine has additional features such as "nested snippets".
+
+Which one to use? If you have python give MarcWeber/UltiSnips a try because its
+fast and supports all important features. You can prefer the UltiSnip versions
+of the snippets by setting the "always_use_first_snippet" option to 1.
+
+If you have VimL only (vim without python support) your best option is using
+garbas/vim-snipmate and cope with the minor bugs found in the engine.
+
+Related repositories
+====================
+We also encourage people to maintain sets of snippets for particular use cases
+so that all users can benefit from them.  People can list their snippet repositories here:
+
+     * https://github.com/rbonvall/snipmate-snippets-bib (snippets for BibTeX files)
+     * https://github.com/sudar/vim-arduino-snippets (snippets for Arduino files)
+     * https://github.com/zedr/zope-snipmate-bundle.git (snippets for Python, TAL and ZCML)
+     * https://github.com/bonsaiben/bootstrap-snippets (snippets for Twitter Bootstrap markup, in HTML and Haml)
+
+Installation using VAM: "github:rbonvall/snipmate-snippets-bib"
+
+Historical notes
+================
+
+[vim-snipmate][1] was originally started by [Michael Sanders][2] who has now
+unfortunately abandoned the project. [Rok Garbas][3] is now maintaining a
+[fork][4] of the project in hopes of improving the existing code base.
+
+
+Language maintainers
+--------------------
+
+No one can really be proficient in all programming languages. If you would like
+to maintain snippets for a language, please get in touch.
+
+* Python - [honza](http://github.com/honza)
+* Javascript - [honza](http://github.com/honza)
+* HTML Django - [honza](http://github.com/honza)
+* Markdown - [honza](http://github.com/honza)
+* Ruby - [taq](http://github.com/taq)
+* PHP - [chrisyue](http://github.com/chrisyue)
+
+Contributing notes
+------------------
+
+Until further work is done on `vim-snipmate`, please don't add folding markers
+into snippets. `vim-snipmate` has some comments about how to patch all snippets
+on the fly adding those.
+
+Because MarcWeber/UltiSnips [6] supports also snipmate-snippets there is no
+need to duplicate all snippets - only those snippets who use advanced UltiSnips
+features should be duplicated in UltiSnips (?)
+
+Currently all snippets from UltiSnips have been put into UltiSnips - some work
+on merging should be done (dropping duplicates etc)
+
+Authors
+-------
+
+For a list of authors, please see the `AUTHORS` files.
+
+License
+-------
+
+Just as the original snipMate plugin, all the snippets are licensed under the
+terms of the MIT license.
+
+
+[1]: http://github.com/garbas/vim-snipmate
+[2]: http://github.com/msanders
+[3]: http://github.com/garbas
+[4]: http://github.com/garbas/vim-snipmate
+[5]: http://github.com/Shougo/neosnippet
+[6]: http://github.com/MarcWeber/UltiSnips
+[7]: http://github.com/SirVer/ultisnips