1. installation docs
2. ALMA mirror selection
make README match index
fix ALMA test file path
fill in ALMA docstrings
security: allow passwords to *not* be stored
password docs, options for ESO too
fix astropy reference in index
minor docstring again
can't use astropy_
change store_password to default to False, and change docs appropriately
changelog
Merge branch 'docs_installation'

Conflicts:
	CHANGES