Use .dev suffix for development versions
Include version in doc and warn if it's a dev version.
Change current release section with a constant title
Fix for THEME_STATIC_PATHS by copying sensitively

If more than one path is defined in THEME_STATIC_PATHS, the theme's
static directory in output is deleted and replaced by the following
path's files.

Using `shutil.rmtree` to remove the entire destination tree if overwrite
is `True` assumes that we didn't want anything at all that was there. We
should recurse through the directory and their subdirs instead, leaving
things put there by the previous path where they were.

I lazily copied almost verbatim the solution for recursively copying a
diectory from http://stackoverflow.com/a/1994840.

The reason for this is patch is that without it, my plugin is broken! It
also makes my code a lot less crazy:

https://github.com/bmcorser/pelicanfly/commit/a83f066
Added metadata information. Refs #1028
Adding placeholder files for regression test
Add regressison test for recursively copying files
Hack out `overwrite` param
Prepare for bumpr
Added bumpr as a development requirement to perform release
Refs #1028. Now iterating over tags
Pin bumpr version to avoid config breakage with new versions
Merge pull request #1057 from astephen2/metadata

Added metadata information. Refs #1028
Merge pull request #815 from noirbizarre/doc-versionning

Documentation versioning
Fix the behavior of Markdown extensions.

There was several issues here:
- `self.extensions` was adding 'meta' multiple times (ref #1058)
- `self.extensions` was keeping a reference to `self.settings['MD_EXTENSIONS']`,
  so adding 'meta' to it.
- the `%s_EXTENSIONS` block coming after, it was overriding `self.extensions`
  with `self.settings['EXTENSIONS']` (while it was a reference, it was working,
  but ...). As this is currently used only for Mardown, the simplest solution is
  to remove this, and let each reader manage its `_EXTENSIONS` setting.
Merge pull request #1066 from saimn/markdown

Fix the behavior of Markdown extensions.
Change the regex so that it parse |filename| and {filename} equally

Updates getpelican/pelican#1061
 Correct upload targets in Makefile.in
Clarification of THEME_STATIC_PATHS behaviour
More exciting files