write_expr_annot: Get expression and annotation tables
In pedrostrusso/cemitooldb: MySQL R database for CEMiTool analyses

This function takes a vector of GEO study IDs, selects those with only one platform and those with samples within a given range. It then uses the collapse_rows function to collapse probes, and finally writes the expression and annotation data to files in the given directory.

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write_expr_annot(gse_ids, min_samples = 15, max_samples = 200,
  directory = file.path(getwd(), "data"), force = FALSE,
  force_repeat = FALSE, get_expr = TRUE, get_annot = TRUE)

`gse_ids`	A character vector containing GEO study accession IDs
`min_samples`	The minimum number of samples for studies (inclusive)
`max_samples`	The maximum number of samples for studies (inclusive)
`directory`	The directory to save files
`force`	If TRUE, overwrites the given directory.
`force_repeat`	If FALSE, avoids downloading study data already present in the 'directory' folder (as informed by folder names).
`get_expr`	If TRUE, get expression data.
`get_annot`	If TRUE, get annotation data.