[TW-216] column format options for udas

_David Patrick on 2013-11-27T05:44:59Z says:_

When customizing a report, you can choose from several format options (try "task columns") but when including a uda, (user-defined attribute, see: "man task") although the are four types of udas, there are basically no report options other than "default". Many of the existing format options for existing attributes, could be logically applied to different types of uda, for example

* string type

uda*
uda.count (words)
uda.indicator

* numeric type

uda.real*
uda.integer
uda.indicator

* date type

uda.formatted*
uda.age
uda.countdown
uda.indicator
uda.remaining

* duration type

uda.duration*
uda.indicator
uda.long

There are no new column formats here, just existing ones applied to udas.