update readme for v0.14.0+

[jordansread]

The function list and package requirements are now out of date. Shouldn't be too much work to get that updated.

[jsta]

I think the function list can be automated with printr if the README is turned into an Rmd with the following series of chunks:

```{r load printr, echo=FALSE,message=FALSE,results='hide'}
loadNamespace("printr")
```

```{r }
help.search("*", package = "glmtools", types = "help")
```

```{r unload printr, echo=FALSE}
unloadNamespace("printr")
```

[jordansread]

Neat! I didn't know that was a thing

[jsta]

Can use https://github.com/r-lib/desc to automate package requirements.

deps <- desc::desc_get_deps()
deps[deps$type %in% c("Imports", "Depends"), 2:3]

[jsta]

This will do it without the dependency:

drop(read.dcf(file = system.file("DESCRIPTION",
                package = "glmtools"), fields = c("Depends", "Imports")))

                                     Depends                                      Imports 
 "R (>= 3.0), GLMr, rLakeAnalyzer (>= 1.8.3)"     "ncdf4, tools, akima, lazyeval, methods"

[lawinslow]

I think we can close this now, right?