make current temperature an attribute of the monitor_temp function instead of a global

initial set of basic docs complete ...

readme formatting

minor doc cleanup

more doc cleanup, update todo

typo and clarification

clarify/cleanup docs in code and md file for 1-wire support

more cleanup and clarification

update note on 1-wire support, fix typo

reorganize readme and add section on operating the timer

add description of temperature sentinel, tidy up todos

comment typo

continuously monitor profile switch allowing user to change it while running, update todos with cleanup tasks

added time/temp spreadsheet to repo, trimmed todos

configure temp probe handling to use /opt/devtimer/temp_probe symlink

update todo

update todos

remove unneeded globals file from repo, update todos

fix leading zero suppression logic, generally tidy up temperature reporting

update todos

update todos

collapse temperature code and globals into main module, implement temp out-of-range signaling

added todo list