add missing exceptions

[striveforbest]

No description provided.

[scanny]

Not clear what you're trying to do with this Alex. This is the legacy version (0.2.x releases) of the code base maintained strictly for projects that incorporated it. The exceptions you've added already exist in the main project https://github.com/python-openxml/python-docx and they aren't called from the 0.2.x code base.

[striveforbest]

@scanny i know its legacy. I didn't find the handy method like getdocumenttext(document) in a new project. the only way i was able to extract text using the new version was to loop through paragraphs and call text on them. but it doesn't include text wrapped in the box or any other shape in the word document. the old legacy version has this handy method but the library is broken due to the broken import. my pull request just fixes the import. if you could point me to the right way of how to easy extract all the text from docx document i'd be very grateful. thanks