Release notes for Weave.jl

Change pandoc output to use inline images if there is no caption.
Use Documenter.jl for documentation.
Add chunk option hold, replaces results = "hold". This way you can use e.g. hold = true, results=raw.
Methods for setting and restoring default chunk options for documents.
New output options md2pdf and md2html, both use pandoc to output pdf and html files directly with own templates.
Restored and improved Winston support.
New input format: scripts with markup in comments
New output format: MultiMarkdown
Added support for figure width in Pandoc
Autodetect input and output formats based on filename
Allow out_path be a file or directory.

19th April 2016

Updated for Julia 0.4x, drop 0.3x support
Each document is executed in separate sandbox module instead of redefining the same one. Fixes warnings and occasional segfaults.
Change the output of chunks:
- Output will be added to the output directly where they are created (default).
- Use results = "hold" to push all output after the chunk.
New chunk option: line_width.
Winston support is not implemented yet for this version.
Bug fix in wrapping output lines.
Internal changes
- Chunks are now represented with their own type. Allows multiple dispatch and easier implementation of new chunks.

4th January 2015

Added AsciiDoc formatter
Default plotting library changed to Gadfly
New option: out_path for controlling where weaved documents and figures are saved
Command line script bin/weave.jl for calling weave from command line

9th December 2014

7th December 2014

First release
- Noweb and markdown input formats
- Support for Gadfly, Winston and PyPlot figures
- Term and script chunks
- Support for markdown, tex and rst output