Merge branch 'hotfix-0.3-5' into develop
Merge branch 'hotfix-0.3-6' into develop
More sophisticated handling of attachments

* `parsePost()` now indicates the type of attachment (if any).
* `parseAttachments()` can be used to extract meta data of attachments into a list of data frames.
Merge branch 'attHandling' into develop
harvestPage now uses a pluggable parsing function.
harvestProfile is now modularized with respect to the parsing function.
Merge branch 'modularization' into develop
Bumped version.
Updated package level documentation and NEWS.
Merge branch 'release-0.4'