move {ARTICLE,PAGE}_DIR -> {ARTICLE,PAGE}_PATHS

Instead of one path a list can be given. This is due to popular request.
Should help people not wanting to use Pelican for blogging.
Maintain backward compatibility though.
Thanks to @ingwinlu for pointing out the change in StaticGenerator.
Fix #1344 move PLUGIN_PATH -> PLUGIN_PATHS

Pelican uses *_PATHS names for settings that represent a list of paths.
Add {PAGE,ARTICLE}_PATHS to {ARTICLE,PAGE}_EXCLUDES automatically

This makes it easier for someone to change PAGE_PATHS without the
need to change ARTICLE_EXCLUDES accordingly.
Remove AsciiDocReader from core. Fixes #1355
[coveralls] Exclude tests from coverage
Merge pull request #1376 from avaris/remove_asciidoc

Remove AsciiDocReader from core. Fixes #1355
Merge pull request #1322 from smartass101/get_files_multiple_paths

move {ARTICLE,PAGE}_DIR -> {ARTICLE,PAGE}_PATHS and correlate with {ARTICLE,PAGE}_EXCLUDES
Fix #1198, enable custom locale in template rendering, fixes links

reverts getpelican/pelican@ddcccfeaa952d2e1e24ceac94e5d66c73b57c01b

If one used a locale that made use of unicode characters (like fr_FR.UTF-8)
the files on disk would be in correct locale while links would be to C.

Uses a SafeDatetime class that works with unicode format strigns
by using custom strftime to prevent ascii decoding errors with Python2.

Also added unicode decoding for the calendar module to fix period
archives.
Fix test errors on OSX

On OSX, if LC_TIME and LC_CTYPE differs the output of strftime is not properly decoded
in Python 3. This makes sure that the 'utils.DateFormatter' and the related Jinja filter
'strftime' set the same value for LC_TIME and LC_CTYPE while formatting.

Also, '%a' is removed from DEFAULT_DATE_FORMAT in 'custom_locale' tests. OSX and *nix have
different conversions for '%a' ('Jeu' vs 'jeu.') and there is not a feasible way to handle
the difference for tests.
Fix HTMLParser related deprecation warnings in Py3.4
Patch docutils.io.FileInput to not use "U" mode in py3

"U" mode is redundant in py3 since "newline" argument replaces it and by default
universal newlines is enabled. As of py3.4, "U" mode triggers a deprecation warning.
Merge pull request #1381 from avaris/fix_1198

Fix 1198 and 729: Fixes links with custom locale and related OS X test errors
Merge pull request #1380 from avaris/py34_warnings

Fix for Python 3.4 deprecation warnings while running tests
Fix test_direct_templates_save_as_false test case

A non-existent asserts_called_count attr was used which would always
succeed, silently hiding the error.
Generator.get_files backwards compatibility for 1 path

This should prevent outdated plugins with generators from failing.
Also fixes #1382.
prettify github make commit message
update make github commit message
Fix "server didn't start" error message in develop_server.sh

It has port 8000 hardcoded into it, which is confusing when the server runs on
another port.
Enhance feedback and contributing guidelines

Many folks ask for help (via IRC or filing GitHub issues) without
sufficient detail and/or without first determining if the answers to
their questions might be better sourced elsewhere. These
documentation changes encourage users to follow certain guidelines
when reaching out for help.
Add troubleshooting info to CONTRIBUTING docs