Add search input and table

I have added an input field to search for the metadata records and a
table to display the details. Currently, toggled visible when clicking
the search link.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Implementing instant search

I have implemented a form of instant search, meaning that if the user
starts typing metadata records are queried from ElasticSearch. The next
step is to display the results in the table.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Display metadata record search results in table

Just added code to empty and refill the table with the metadata record
results received through the JSON request.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>