Streamlining user interface

[nsheff]

A collection of problems I ran into when trying to use looper for a project:

• the project missing sample_name, but with sample_table_index set correctly, cannot run in looper #459
• it was too hard for me to create a project from a yaml table Make a peppy.Project from a sample yaml file #458
• peppy.Project didn't have a clear way to create the project from csv, either, once I had that #460
• should it be easy to create a peppy.Project from a pandas dataframe? #461
• pep 2.1.0 docs were not the deployed docs
• should pephubclient become part of peppy to simplify things? #462

[nsheff]

example: I would like to make a peppy.Project from a sample yaml file:

- sample_name: sample 1
  file: path/to/file.tsv
- sample_name: sample 2
  file: path/to/2.tsv

prj = peppy.Project(sample_yaml="path.yaml")

or `prj = peppy.Project(sample_yaml={ ... sample dict ... })

[nsheff]

these are all done, or tracked in other issues.