check_src_folder: Check source folder for abnormal files
In bi-sdal/sdalr: Convenience functions for the Social and Decision Analytics Lab

Check source folder for abnormal files

check_src_folder(proj_dir, r_files_patterns = c("*.r$", "*.rmd$"),
  ignore_patterns = c(".gitignore", "readme*", "*.py"),
  data_patterns = c("*.csv$", "*.xls$", "*.xlsx$", "*.rdata$"),
  pattern_ignore_case = TRUE, verbose = FALSE)

`proj_dir:`	root project directory
`r_files_patterns:`	vector of regular expressions to match R script files
`ignore_patterns:`	vector of regular expressions of files to ignore in the source folder
`data_patterns:`	vector of regular expressions to look for data files that should not exist in a source folder
`pattern_ignore_case:`	bool on whether or not to ignore case when doing regex match
`verbose:`	bool on whether to print statements