As a user I would like to be able to filter lessons by tags

[jrobind]

This is an epic issue. List of individual issues needed to achieve this epic are below:

• Add lesson tags logic Add lesson tags #59
• Modify UI allowing user to add lesson tags (Modify UI allowing user to add lesson tags #60)
• Implement lesson tag filtering Implement lesson tag filtering #61

[1219aks]

Hi, can you assign me this task please.