Reads a BED/BED.gz/BED.zip file and returns a misha 1D intervals data
frame. Track/browser/comment header lines are skipped automatically.
Chromosome names are normalized through the active database's
CHROM_ALIAS mechanism (so chr1 <-> 1 works without
explicit configuration).
gintervals.import_bed(file = NULL, name = TRUE, score = TRUE, strand = TRUE)A 1D intervals data frame, sorted by chrom and start.
BED is already 0-based half-open, so coordinates are taken as-is.