[ANN] webgen 1.4.0 - static website generator

[Thomas Leitner]

## About webgen

webgen is a tool to generate static websites by combining content
with template files. You create one or more template files in which
you define the layout of your page and where the content should go.
After that you create page files in which you only define the
content.

You can
* use a variety of markup languages like Markdown or Textile or
Haml to define your content,
* add dynamic parts via ERB or by using webgen tags,
* add automatic generation of menus, breadcrumb trails,
* use partial website generation for faster builds,
* integrate RDoc API documentation into a website,
* and much more!

Homepage for installation instructions and documentation (completely
built with webgen itself, uses nearly all features):
http://webgen.gettalong.org/
https://github.com/gettalong/webgen-website

Small website built with webgen:
http://cmdparse.gettalong.org
https://github.com/gettalong/cmdparse/tree/master/webgen.config
https://github.com/gettalong/cmdparse/tree/master/doc


## webgen 1.4.0 Release Announcement

Thanks to an (unrelated) bug report for a website with more than [4700
page files] I tried to optimize the node finder a bit more, with
quite good results!

Depending on the options one uses, node finder option sets can now be
cached more effectively which brings down the number of different node
sets and therefore more performance (drastically in some cases)!

Another important change is the new io_open_mode meta information
which can be used to change how a file should be opened. This allows
one, for example, to use the mode 'r:BOM|UTF-8' to open UTF-8 files
with a Unicode byte order marker without problems or to specify
different encodings for certain files.

Last but not least: webgen now uses [cmdparse] version 3.0.1 instead of
2.x which brings better help output and some other nice changes.
However, this also means that custom CLI extensions won't work anymore!
If you have written such an extension, please update it to be
compatible to the newer cmdparse version!


### Changes

* 7 minor changes:

- Optimized node finder to more effectively cache node sets
- Nicer hierarchical output for item tracker nodes descriptions when
using `webgen show dependencies`
- Updated path handler api to optionally produce a true
hierarchical structure instead of the standard RDoc file/directory
structure
- Updated path handler api to additionally create fragment nodes
for attributes (not just methods)
- Updated path handler api template to use an `<h2>` heading
instead of `<h1>`
- The IO open mode can now be set on a per path basis with the new
io_open_mode meta information (requested by Johann Friedrich
Heinrichmeyer)
- The [cmdparse] dependency has been updated to 3.0.1

* 6 bug fixes:

- Fixed content processor sass to work with Sass 3.3 and greater
- Paths named like `number.lang.ext` (e.g. `2014.en.page`) are now
correctly handled (reported by Lars Bähren)
- Removed invalid quote character from RSS feed template (patch by
Sven Hertle, fixes [GH#6])
- Paths like `someFile.png` now get the title 'SomeFile' instead of
'Somefile'
- Fixed path handler sitemap to ignore nodes that have the
no_output meta information set
- Setting an empty pipeline on a block in a Webgen Page Format file
now works

[4700 page files]: https://groups.google.com/forum/#!msg/webgen-users/0aHGHRf6Sik/h1mIBm2cpa0J
[cmdparse]: http://cmdparse.gettalong.org
[GH#6]: https://github.com/gettalong/webgen/pull/6

Cheers,
Thomas