Update README.rst with additional information about dependencies and correct call of installation.
Add links to get sample input files. Updated dependency list.
Simplifying names and correcting some rst grammar.
Combiined cyclopts dependency list into cyclus dependency list.
Remove indirect dependencies
Merge remote-tracking branch 'upstream/develop' into minor_changes
Merge branch 'minor_changes' of https://github.com/rakhimov/cyclus into minor_changes
Merge pull request #588 from rakhimov/minor_changes

Update README.rst with additional information about dependencies and cor...