src/visu/figure_maker.py: Add a stat parameter to perform statistical analysis on the metagene figure

src/gc_content/gc_content.py: add an id column in the table returned  by build_gc_dataframe, change bar colors in make_gc_barplot function

src/commands.sh: add creation of meatagene and gc content figure for readthrough, readthrough_ctcf and no_readthrough exon list

src/gc_content/gc_stats.py: fix mann_whitney and make_stat function used when more than two lists of exons are used

src/bed_handler/select_regulated_near_ctcf_exons.py: new function get_bed_ctcf_exon to only recover exons close to CTCF peaks in a given bed file containing exons

src/bed_handler/get_last_exons.py: script to get the last exons of each gene in a bed file given in input

src/commands.sh: modification of metaexon file of exons regulated or in a gene containing exons regulated by DDX5/17 near or Far from CTCF

src/commands.sh: change gc content figure -e parameter to 2000 + coverage figure for 5y only on expressed genes