New input process: signed to unsigned

Unsigns a value received as signed. This allows for the recombination
of longs transmitted as signed ints.

This commit creates arg type None, for input processes that don't need
any argument, like this one, or allow positive / negative.
Merge pull request #82 from Jerome-github/signed_to_unsigned_input_process

New input process: signed to unsigned
Bugfix: NONE process not defined in update_class.php

Error introduced in commit fd3fa33
Missing semicolon

Thanks to Oscar Carlsson for his review
fixing input_ontime comparison

This allows to use pump data (l/h) to count the amount of time
Merge pull request #86 from Jerome-github/signed_to_unsigned_input_process

Signed to unsigned input process : bugfixes
Merge pull request #89 from ibr/master

Fixing input_ontime comparison
Reports the minimum or maximum daily feed value

Adds the option to record the minimum or maximum daily feed value, which resets to current feed value at midnight. The reset allows the function to operate with sub zero data (the mysql default is null which would otherwise create problems).
The feed is only updated whenever a 'new max' or 'new min' is encountered.
Thanks to Jerome for his help with this.
Paul
Adds min & max description for process_model.php update
Amendment to feed update test
Merge pull request #90 from Paul-Reed/patch-1

Reports the minimum or maximum daily feed value
emoncms.org version of emoncms with timestore conversion ui
Create timestore feed, db fields for conversion
Merge branch 'master' of https://github.com/emoncms/emoncms into emoncmsorg

Conflicts:
	Modules/feed/feed_model.php
include entry for timestore adminkey
Implementation of delete feed for timestore
Timestore export functions
Function to return timestore feed meta data: start time, interval, npoints
Function to return timestore feed metadata: start, interval, npoints
Timestore feed export implementation