Issue/241 ggforest alignment

[fabian-s]

Fixes #241 -- ggforest no longer tries to bolt a table fulll of text to the coefficient plot, instead the annotations are done via ggplot2::annotate, see example below

Thx for the great package

setwd("~/survminer")
library("devtools")
library("survival")

colon <- within(colon, {
  sex <- factor(sex, labels = c("female", "male"))
  differ <- factor(differ, labels = c("well", "moderate", "poor"))
  extent <- factor(extent, labels = c("submuc.", "muscle", "serosa", "contig."))
  })
bigmodel <- coxph( Surv(time, status) ~ sex + rx + adhere + differ + extent + node4,
  data = colon )

# old version:
system("git checkout master")
load_all(".")
ggforest(bigmodel)

#new version:
system("git checkout issue/241")
load_all(".")
ggforest(bigmodel)