Add exact sampling functionality (#13)

Remove metavar from argparser (#12)

Update README.md

manuscript_data_availability.md

Forgot to initialise the seqSys and profile variables - oops. Issue #8

Allowed custom quality score profiles for ART - see github issue #8

fixed typo and removed errfree as it doesn't do what I wanted. Fix the readme.

added options for ART --qShift and --errfree

fixed typo of dirichlet, added option to fragment amplicons, turning off --amplicon mode from ART, adding options for --fragment_amplicons --fragment_len_mean and --fragment_len_sd.

updated workflow image

created change log and updated vignettes

created change log and updated vignettes

make primer_set argument a requirement

allow a parameter for disallowed positions where HF deletions and substitutions aren't allowed

Added option for custom primer sets