MediaWiki reader: Accept image links in more languages

In some of the Wikipedia versions the local version of 'File' is used (for example 'Archivo' in Spanish)
InDesign ICML Writer
Add a simple Emacs Org-mode reader

The basic structure of org-mode documents is recognized; however,
org-mode features like todo markers, tags etc. are not supported yet.
Update README to include info on Org-mode reader
Merge pull request #1179 from tarleb/org

Add a simple Emacs Org-mode reader
Added org-mode to list of readers in cabal description.
Merge branch 'master' of https://github.com/mb21/pandoc into mb21-master
Updated README and pandoc.cabal with icml writer.
Added default.icml to templates.
Templates:  YAML objects resolve to "true" in conditionals.

Closes #1133.

Note:  If address is a YAML object and you just have $address$
in your template, the word "true" will appear, which may be
unexpected.  (Previously nothing would appear.)
SelfContained:  Handle "poster" attribute in "video" tags.

Closes #1188.
HTML writer: Add colgroup around col tags.

Also affects EPUB writer.
Closes #877.
PDF:  Use / as path separators even on Windows.

This seems to be necessary for texlive.
Closes #1151 (again!).
PDF:  Use / as path separators in tempdir on Windows.

This is needed for texlive.
Note that the / is used only in the body of withTempDir,
so when the directory is deleted, the original separators will
be used.

See #1151.
PDF: Use / as path separators in latex input only

Fixes compile error on Windows for 5040f3e
Reverted back to canonical file separators </> in all places except for
arguments to the LaTeX builder and in TEXINPUTS

See #1151.

Note: Temporary directories still fail to be removed in Windows due to
call of ByteString.Lazy.readFile creating process ownership of the
compiled pdf file.
Merge pull request #1190 from eVITAERC/patch/1151-windows-texlive

PDF: Use / as path separators in latex input only
Man writer:  Ensure that terms in definition lists aren't line wrapped.

Closes #1195.
RST writer:  Avoid stack overflow with certain tables.

Closes #1197.

Note that there are still problems with the formatting of
the tables inside tables with output produced from the input
file in the original bug report.  But this fixes the stack
overflow problem.
EPUB writer:  Incorporate files linked in <video> tags.

src and poster will both be incorporated into content.opf
and the epub container.

This partially address #1170.
Still need to do something similar for <audio>.
EPUB writer:  Handle media in audio source tags.

This should resolve the rest of #1170, but it needs
extensive testing.

Note that we now use a 'media' directory rather than 'images'.