API tagging implementation

[stefannibrasil]

The goal of this Issue is to improve #1934, as discussed in #2755.

We need to include tags in the URL input. This should solve #2254.

Steps

• Include tags in URL:

  plots2/app/api/srch/search.rb

  Lines 118 to 119 in 46f3d43

  	# Request URL should be /api/srch/locations?srchString=QRY[&seq=KEYCOUNT&showCount=NUM_ROWS&pageNum=PAGE_NUM]
  	# Note: Query(QRY as above) must have latitude and longitude as srchString=lat,lon

• Update the nearbyNodes method to also include tags:
  

  plots2/app/services/search_service.rb

  Line 188 in 46f3d43

  def nearbyNodes(srchString)

• Update doc/API.md file with the new functionality

[stefannibrasil]

@Gauravano @sagarpreet-chadha @jywarren I've written this Issue to coordinate better our contribution. I am working on this, I just need more time to configure my PC again because I've updated my OS 😄