BUG: Fix issue with posting images.

A possible fix for #97.  When posting an image, emacs returns the
error `Multibyte character in data for base64 encoding`.  This commit
adds a fix as described
[[http://osdir.com/ml/help-gnu-emacs-gnu/2012-04/msg00173.html][here]]
BUG: Posts are posted with the wrong time-stamp.

Something seems to have changed in org-mode, which caused the posts to
be posted with the correct date, but no time and effectively posting
all posts at midnight.  This commit fixes #96.
ENH: Read file in rawmode

A possible fix for #97
org2blog-pkg.el:update org-mode version
Merge pull request #98 from myuhe/org-ver

org2blog-pkg.el:update org-mode version
Add a minor detail on the doc (the dependency on the netrc lib).
Merge pull request #100 from ardumont/master

[doc] added the (require 'netrc) for the netrc setup
Fix compatibility with org-mode >= 7.9.3

In org-mode 7.9.3 the optional argument 'HIDDEN' has been removed from
org-export-as-html. The function now takes 4 optional args instead of 5.
Merge pull request #103 from ptrv/fix-publishing-org-7.9.3

Fix compatibility with org-mode >= 7.9.3
remove bundled metaweblog.el
Merge pull request #111 from tarsius/master

remove bundled metaweblog.el
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