It appears that all big-text issues have been fixed: git bugs #28, #63 and #64.  I'll leave them open a bit longer.
All tests pass and pylint is happy.
Enabled this feature by default by setting @int max-pre-loaded-body-chars = 30000 in leoSettings.leo.
A few tweaks to the BigTextController command:
- Don't show the "Load Text With @killcolor if the text already starts with it.
- Added should btc.should_go_away, with call to same in LeoTree selection logic.

Leo build: 20141019211052