Add preliminarily support for org-mode version 8.0
Improve support for different versions
Fix conditional
Make org2blog/wp-replace-pre compatible with org 8
Fix wp-post-subtree
Add credit
Remove metaweblog tests
Bump version
Require new exporter only for org version >= 8
Prevent org2blog-autoloads from byte-compiling
Merge pull request #126 from ptrv/org-8-support

Org 8 support
Add location of metaweblog to README

Fixes #117