Bump version number for 2.1.3 release.

Bump version number for 2.1.2 release.

Bump version number for 2.1.1 release.

Update release notes for 2.1.0 release.

Remove some really old #if 0 code; most of it hasn't been touched in …

…years. Not of any value anymore.

Fixes -ggdb3 GNU 'as' incompatiblity - commit to trunk

- merged releases/1.9.0 r331:333.

- doc fixups for 2.0.