[[Imported from SVN: r1808]]

sample code.

[[Imported from SVN: r1807]]

[[Imported from SVN: r1806]]

This seems to be natural as there also is the possibility to get an
iterator positioned before the first element.

[[Imported from SVN: r1805]]

[[Imported from SVN: r1804]]

[[Imported from SVN: r1803]]

[[Imported from SVN: r1802]]

[[Imported from SVN: r1801]]

* cleaned out equals and dereference

[[Imported from SVN: r1800]]

[[Imported from SVN: r1799]]

[[Imported from SVN: r1798]]

[[Imported from SVN: r1797]]

[[Imported from SVN: r1796]]

* new GridTraits
* removed equals and dereference from the Iterator classes

[[Imported from SVN: r1795]]

[[Imported from SVN: r1794]]

[[Imported from SVN: r1793]]

[[Imported from SVN: r1792]]

[[Imported from SVN: r1791]]

[[Imported from SVN: r1790]]

[[Imported from SVN: r1789]]

Not seriously tested yet, though.

[[Imported from SVN: r1788]]

[[Imported from SVN: r1787]]

[[Imported from SVN: r1786]]

[[Imported from SVN: r1785]]

[[Imported from SVN: r1784]]

[[Imported from SVN: r1783]]

individual tuple elements.  So now the class documentation contains
a little example of how you're supposedly supposed to do it.

[[Imported from SVN: r1782]]

[[Imported from SVN: r1781]]

I also started work on a method which gives me all topological
descendants of a given boundary face.  It encapsulates UG functionality
and is currently not very elegant.  Unfortunately, I need it _urgently_.

[[Imported from SVN: r1780]]

[[Imported from SVN: r1779]]

[[Imported from SVN: r1778]]

[[Imported from SVN: r1777]]

[[Imported from SVN: r1776]]

Made copy constructor of geometry public.

[[Imported from SVN: r1775]]

[[Imported from SVN: r1774]]

[[Imported from SVN: r1773]]

[[Imported from SVN: r1772]]

create any problems for anyone.  If so, please yell a me.

[[Imported from SVN: r1771]]

[[Imported from SVN: r1770]]

[[Imported from SVN: r1769]]