creation of geometry index dev branch
rtree node xxx_poly visitor and node types renamed to dynamic_xxx and moved to dynamic_visitor.hpp
added node/concept.hpp and moved some of empty definitions there.
renamed node types files
implemented basic functionality of node_proxy
NodeProxy used in visitors instead of Parameters, Translator and Allocators.
NodeProxy create() template member replaced by template function.
index dev branch created
Data changing in traversing process moved to separate structure.
added quick speed test
fixed some warnings and error, added nearest query test which don't find all values.
moddified speed test
Added exact_match parameter to are_boxes_ok() check.
Exception-safety of the default insert and split algorithms improved.
mem leaks related to exceptions fixed in linear redistribute_elements.
potential mem leaks fixed in inserting algorithms, exceptions tests added.
exceptions test improved.
mem leaks related to exceptions in remove fixed
mem leaks related exceptions in rtree copying fixed
Error related to the state of the rval after moving fixed. The root being NULL is valid state. Root is created lazily, if needed. This means that default constructor won't throw as well as moving operations.