wordpress importer: fallback onto wp:post_id if wp:post_name is empty
Python-Markdown quote's URL's, we need to unquote to use on filesystem

Fixes #1143
Closes #1095
Closes #1149
Minor wording changes in develop_server.sh
Fixing a typo in documentation
Merge pull request #1186 from mhrivnak/patch-1

Fix a typo in documentation
Merge pull request #879 from joeshaw/post-id

Wordpress import error on empty <wp:post_name>
Fix #1182#
Merge pull request #1190 from w-vi/quickstart-fix1182

Fix for issue #1182