New feature: Drawing thick lines with line caps

[Regina Henschel]

Hi all,

in ODF (and in SVG) exists the feature, that a thick line can get round 
or square line caps at the end of the line. Those caps are added to the 
single parts too, if the line is dashed.

I have started to implement that features. Because Armin had re-factored 
(some years ago) the internal to use primitives, I could get it work 
till you see those line caps on screen. Unfortunately there are still 
some parts in Draw which are very old and confusing. Here Armin has 
jumped in and added the missing parts.

You can have a look at this upcoming feature in the branch 
https://svn.apache.org/repos/asf/incubator/ooo/branches/alg/linecap
An intermediate Windows build is available from 
http://people.apache.org/~alg/wntmsci12/setup.zip.

Kind regards
Regina