branch renamed

[SVN r72606]
min and max elements numbers are now template parameters. New node type added - with arrays of static size. Various parameters are the first template parameter of options::rtree.

[SVN r72618]
Static parameters are now used everywhere in the code. Further optimizations implemented in quadratic redistribute_elements. Some errors corrected in pushable_array.

[SVN r72619]
c++98 errors fixed

[SVN r72620]
Implemented R* choose_next_node algorithm version choosing by nearly min overlap cost

[SVN r72714]
area-related names changed to content-related names. index::within parameters sequence corrected to match the geometry::within parameters sequence.

[SVN r73027]
example changed, now size of a rtree isn't loaded from file.

[SVN r73028]
visitors are now explicitly nonassignable. rtree is set as noncopyable since copying isn't implemented.

[SVN r73029]
node tag names changed

[SVN r73140]
insert tags renamed

[SVN r73154]
node split algorithm separated from insert visitor, it's now tag-dispatchable.

[SVN r73157]
some options-related template parameters names changed

[SVN r73158]
within and distance_sqr removed from index/algorithms. geometry::covered_by used in remove visitor.

[SVN r73370]
intersects replaced by overlaps in find visitor

[SVN r73391]
previous change reverted - intersects used instead of overlaps

[SVN r73392]
predicates implemented, query() method added to the rtree + some cleanup.

[SVN r74082]
k nearest neighbors search implemented, empty predicate added, pop_back() added to pushable_array, glFlush() and glClear() calls removed from gl_draw(), number of found objects added to spatial query, find visitor and corresponding rtree's method removed.

[SVN r74422]
nearest_filter implemented, spatial_filter changed to query_filter.

[SVN r74435]
maxdist algorithm added

[SVN r74438]
namespace names error fixed

[SVN r74439]