Handle new PURPLE CNV file

[pdiakumis]

At some point the PURPLE purple.cnv.gene.tsv file had some changes made to its columns. We need to handle the newer structure:

• old:

  chromosome  start    end gene        minCopyNumber maxCopyNumber unused somaticRegions germlineHomDeletionRegions germlineHetToHomDeletionRegions transcriptId    transcriptVersion chromosomeBand minRegions minRegionStart minRegionEnd minRegionStartSupport minRegionEndSupport minRegionMethod minMinorAlleleCopyNumber
   <chr>       <int>  <int> <chr>               <dbl>         <dbl> <chr>           <dbl>                      <dbl>                           <dbl> <chr>           <chr>             <chr>               <dbl>          <int>        <int> <chr>                 <chr>               <chr>                              <dbl>
 1 chr1        11869  14409 DDX11L1              1.98          1.98 0                   1                          0                               0 ENST00000456328 2                 p36.33                  1              1      2652000 TELOMERE              NONE                BAF_WEIGHTED                           0

 1 chromosome                     
 2 start                          
 3 end                            
 4 gene                           
 5 minCopyNumber                  
 6 maxCopyNumber                  
 7 unused                         
 8 somaticRegions                 
 9 germlineHomDeletionRegions     
10 germlineHetToHomDeletionRegions
11 transcriptId                   
12 transcriptVersion              
13 chromosomeBand                 
14 minRegions                     
15 minRegionStart                 
16 minRegionEnd                   
17 minRegionStartSupport          
18 minRegionEndSupport            
19 minRegionMethod                
20 minMinorAlleleCopyNumber       

• new:

   chromosome  start    end gene        minCopyNumber maxCopyNumber somaticRegions transcriptId    isCanonical chromosomeBand minRegions minRegionStart minRegionEnd minRegionStartSupport minRegionEndSupport minRegionMethod minMinorAlleleCopyNumber depthWindowCount
   <chr>       <dbl>  <dbl> <chr>               <dbl>         <dbl>          <dbl> <chr>           <lgl>       <chr>               <dbl>          <dbl>        <dbl> <chr>                 <chr>               <chr>                              <dbl>            <dbl>
 1 chr1        11869  14409 DDX11L1              1.93          1.93              1 ENST00000450305 TRUE        p36.33                  1              1      1117830 TELOMERE              BND                 BAF_WEIGHTED                           0               78

 1 chromosome              
 2 start                   
 3 end                     
 4 gene                    
 5 minCopyNumber           
 6 maxCopyNumber           
 7 somaticRegions          
 8 transcriptId            
 9 isCanonical             
10 chromosomeBand          
11 minRegions              
12 minRegionStart          
13 minRegionEnd            
14 minRegionStartSupport   
15 minRegionEndSupport     
16 minRegionMethod         
17 minMinorAlleleCopyNumber
18 depthWindowCount