Pull request for projection.data combination and cell type selection in panel

[leprohonmalo]

New function :

• panelProjection() : function to project sc_data against reference panel (factorized code from old dataProject).
• multiRCApanel() : function that merge projection.data from several call of dataProject
• ctQueryReg() : function to select cell type from panel using regular expression, implemented in multiRCApanel, dataProject and panelProjection.
• ctQueryTFIDF() : same than previous but using tf-idf metric. Not implemented in other function yet as there is a high variability in result depending on query precision and cut-off score (It still works if you find the good enough one).

Change :

• dataProject() : implemented pre-processing for ColonEpiPanel and some small changes to handle problems that may arise from cell type selection.