[geometry] updated doc/releaes notes for 1.54

svn path=/trunk/libs/geometry/; revision=84258
geometry.index docs: index general introduction modified, not included yet

svn path=/trunk/libs/geometry/; revision=84259
geometry docs: sections rearranged, titles unified.

svn path=/trunk/libs/geometry/; revision=84260
geometry.index docs: section title changed.

svn path=/trunk/libs/geometry/; revision=84261
geometry.index docs: sections in section 'Creation and Modification' replaced by headings.

svn path=/trunk/libs/geometry/; revision=84262
geometry.index docs: typo fixed.

svn path=/trunk/libs/geometry/; revision=84278
geometry.index: added handling of Segments to path queries.

svn path=/trunk/boost/geometry/; revision=84292
geometry.index test,example: added benchmark and test for segment path queries.

svn path=/trunk/libs/geometry/; revision=84293
geometry.index docs: experimental features commented, sections replaced by headings in queries description

svn path=/trunk/libs/geometry/; revision=84296
geometry::index: wrong result_type in calculate_distance for path predicate fixed

svn path=/trunk/boost/geometry/; revision=84344
[geometry] added Mats' example of adapting a legacy hierarchy, added SVG samples

svn path=/trunk/libs/geometry/; revision=84393
[geometry] SVG (mainly svg_mapper) documentation

svn path=/trunk/boost/geometry/; revision=84394
[geometry] merged up to 84394 into Release branch

svn path=/branches/release/boost/geometry/; revision=84395