Iterator: Remove use of eti baseclass workaround.

[SVN r85940]
Iterator: Remove obsolete GCC version check.

[SVN r86055]
Remove use of BOOST_ITERATOR_CATEGORY

[SVN r86056]
Iterator: Remove obsolete MSVC version checks.

[SVN r86082]
Remove BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION

Process #ifndef...#endif conditions.

[SVN r86244]
Remove BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION

Process #ifdef...#else...#endif blocks.

[SVN r86246]
Simplify multi-component ifdefs containing BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION

[SVN r86248]
Remove remaining occurances of BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION

These evaded scripting.

[SVN r86249]
Remove use of obsolete BOOST_TT_BROKEN_COMPILER_SPEC

[SVN r86250]