#69 Update Atlas Navigation

[tariqksoliman]

Closes #69

@anilnatha Let me know if you have any more specific thoughts on what links should or shouldn't be here and their ordering.

New navigation panel looks like:

Links:

 [
    {
        name: 'Home',
        path: 'https://pds-imaging.jpl.nasa.gov/'
    },
    {
        name: 'Atlas'
    },
    {
        name: 'Search Images',
        path: '/search'
    },
    {
        name: 'Browse Archive',
        path: '/archive-explorer'
    },
    {
        name: 'Cart',
        path: '/cart'
    },
    {
        name: 'Documentation',
        path: '/documentation'
    },
    {
        name: 'Data'
    },
    {
        name: 'Volumes',
        path: 'https://pds-imaging.jpl.nasa.gov/volumes/'
    },
    {
        name: 'Holdings',
        path: 'https://pds-imaging.jpl.nasa.gov/holdings/'
    },
    {
        name: 'Portal',
        path: 'https://pds-imaging.jpl.nasa.gov/portal/'
    },
    {
        name: 'PDS'
    },
    {
        name: 'Home',
        path: 'https://pds.nasa.gov/'
    },
    {
        name: 'Release Calendar',
        path: 'https://pds.nasa.gov/datasearch/subscription-service/data-release-calendar.shtml'
    },
]