- this provides a better typesafe means of locating predefined cell
models than relying on strings. The lookup is now ptr() or ref()
directly. The lookup functions behave like on-demand singletons when
loading "etc/cellModels".
Functionality is now located entirely in cellModel but a forwarding
version of cellModeller is provided for API (but not ABI) compatibility
with older existing user code.
STYLE: use constexpr for cellMatcher constants
- suppress error messages that appear with zsh.
According to unset(1p), 'unset -f' unsets a function.
If the function was not previously defined, this is a no-op.
This is similar for zsh, but there it emits a warning if the
function was not previously defined.
- avoid 'local' in functions sources from etc/bashrc.
ksh does not support this.
- use 'command' shell builtin instead of 'type'.
Seems to be more consistent between shell flavours.
- as per bashrc,cshrc delimit with
"# USER EDITABLE PART"
"# END OF (NORMAL) USER EDITABLE PART"
this can help simplify any patching for system-building scripts etc.
