Embedded documentation for tklib. Tweaks to sak/localdoc (different toplevel nav, dtplite not local)
Fix toc to manpage linkage
[Bug 3603562]: Allow the confinement of the crosshairs to one or more
rectangular bounding boxes. Bumped version to 1.1.
First set of manpages getting category information, plus extended set of keywords.
Accepted changes by Frank Gover for robustness of bbox handles. Accepted plotchart based examples for multiple bounded crosshairs.
Do not invoke the tracking callback while the crosshairs are out of bounds.
Extend the set of tests for the coordinate transformation procedures.
This revealed that the procedure pixelToCoords had not been updated for
the various transformation options. This has now been corrected.
Other changes: explicitly take care of an expected value of 0 and 
more accurate conversion factor degrees to radians.
Document the subtext subcommands.
Compute the new margins based on the presence or absence of subtexts to the axes.
Bumped version to 2.1.0 to reflect the addition of these subcommands and the
repair of the pixelToCoords procedure.
Correct the use of options for the vertical subtext.
Add missing procedures from previous checkin.
Merged latest crosshair work to the pending release.
Merged latest plotchart work into the pending release.
Merged trunk changes (embedded docs) to pending release.