Description of Pacbio reads and why we need filtering

[jordenrabasco]

Here is the description of Pacbio reads and why the filtering/trimming steps are important

https://github.com/jordenrabasco/Long_read_processing_tutorial/blob/afa1a962b305b79b0473a644cd9133a992bfa9ea/long%20read%20Tutorial.Rmd#L97