phy2tsv: add sequence to otu table

- add exception for affiliation with more than 7 ranks.

- add option to use more than one covariable in statistical tests
- add information in help message
- add post hoc test in alpha

update

add krona plot of shared taxa

with interactive plotly

"other" at the bottom

of phyloseq object

to get phyloseq object from external datas.
merge
other update

- generating automatically rmd template for figures - find automatically 
anomaly path - handles column2 by "handmade" faceting