A list of problems with functions .kraft.2015b to .marx.2016

[stemkov]

I checked 16 functions, from .kraft.2015b to .marx.2016, alphabetically. The following functions did not have problems in the downloads:
.lagisz.2013
.limpens.2014a.
.limpens.2014b
.lu.2016a
.lu.2016b
.lu.2016c
.lupold.2013
.martin.2016

The following functions had problems in the downloads:

.kraft.2015b: Potentially non-trait variables: abundance

.kuo.2014: Needs to be run twice to work, otherwise good

.lawson.2015: One species is "Tree (Sportsmans 57)", otherwise good

.lessard.2016: Missing metadata. Some units seem wrong: "?" and "range"

.lislevand.2006: "egg_mass" is measured in "f"

.madin.2016: no metadata. "Skeletal micro-density" units should be "g cm^-3". looks like there's some numeric variables in the character list

.martin.2014: species name is just "O_canadensis"

.marx.2016: There are a few hundred empty rows in the numeric list with units. For example, see “data.frame(a$numeric$variable,a$numeric$units)[620:650,]”. Otherwise, good

I added citations to citations.tsv for the following functions:
.lagisz.2013
.lislevand.2006
.lupold.2013
.martin.2014