R: Vignettes and other documentation

# Vignettes and other documentation

## Vignettes from package 'fastai'

fastai::Basic_Tabular |  | Basic Tabular | HTML | source | R code
fastai::audio |  | Audio Classification | HTML | source | R code
fastai::audio2tf |  | Speech Recognition | HTML | source | R code
fastai::basic_img_class |  | Basic Image Classification | HTML | source | R code
fastai::bayes_opt |  | Bayesian Optimisation | HTML | source | R code
fastai::callbacks |  | Callbacks | HTML | source | R code
fastai::catalyst |  | Migrating from Catalyst | HTML | source | R code
fastai::custom_img |  | Custom Image Classification | HTML | source | R code
fastai::data_aug |  | Data augmentation | HTML | source | R code
fastai::gpt |  | GPT2 | HTML | source | R code
fastai::head_pose |  | Head pose | HTML | source | R code
fastai::lightning |  | Migrating from Lightning | HTML | source | R code
fastai::low |  | Low-level ops | HTML | source | R code
fastai::medical_dcm |  | Medical image | HTML | source | R code
fastai::migrating_ignite |  | Migrating from Ignite | HTML | source | R code
fastai::migrating_pytorch |  | Migrating from Pytorch | HTML | source | R code
fastai::multilabel |  | Multilabel classification | HTML | source | R code
fastai::obj_detect |  | Object detection | HTML | source | R code
fastai::optimizer |  | Optimizer | HTML | source | R code
fastai::question_answering |  | Question-Answering | HTML | source | R code
fastai::super_res_gan |  | Super-Resolution GAN | HTML | source | R code
fastai::textclassification |  | RoBERTa | HTML | source | R code
fastai::textsummarize |  | Text-summarization | HTML | source | R code
fastai::time_series |  | Time-Series | HTML | source | R code