Alcr/dashapplication

[ancara-art]

This PR includes:

Removing: -Dropdown and functionality of dropdown.

Additions back-end:

• Re-organization of loading of data.
• Addition of K-means and HDBSCAN algorithms
• Call back of K-means and HDBSCAN when clicking a point in the map for clustering.
• Adding functionality in radio buttons.
• Adding functionality in the Clear clustering button for displaying all the data.

Front end additions and changes:

• Changing marker of school points: property college; and opacity of points (school and parents).
• Changing the type of map.
• Adding CSS and bootstrap libraries.
• Adding radio buttons for algorithms.
• Adding a text box for entering a number of clusters. (numeric input)
• Setting margins.
• Addition of Clear clustering button.

This PR closes #6