more formatting information

[MrPugh]

I am reviewer at CHES and I have observed that presumably due to a lack of instruction authors are using very different formatting in regard to section capitalization and float placement.

Here is a suggestion on how formatting may be done (as specified in iacrdoc):

• Use Camel Case for section headings on all levels.
• Place all floats on top of the page.
• Use full sentences for float captions.

I also added explicit examples for figures and tables including their captions to iacrdoc.

This would provide more clarity on how these aspects should be formatted to achieve a 'unified look' in IACR publications. The hope is that in the future paper submission will follow a more unified formatting in these regards right away without the need for suggestions or corrections by reviewers and editors.