Add Global Search and Global Beacon support

[davecap]

closes #409

Description

Adding support:

• Global Beacon functionality:
  • Toggle on/off global beacon for the dataset
  • Check Global Beacon indexing status
• Global Search functionality
  • Low level search functionality, similar as there is on the Mesh web application (Global Search docs)
• Example Jupiter notebooks files for demonstrating new functionality that is introduced:
  • global_beacon_idexing.ipynb
  • global_search.ipynb

Examples

• Global Beacon

  # Dataset object
  dataset = solvebio.Object.retrieve(123456789)
  
  # Global Beacon functions
  dataset.enable_global_beacon()
  dataset.disable_global_beacon()
  dataset.get_global_beacon_status()

• Global Seach

  # Advanced search
  advanced_query_results = GlobalSearch("fuji")
  
  # Entity search example
  GlobalSearch(entities=[["variant", "GRCH38-7-140753336-140753336-T"]])
  
  # Get list of subjects for the entity search
  GlobalSearch(entities=[["gene","BRCA2"]]).subjects()
  
  # Date range
  search = GlobalSearch()
  objects = search.filter(created_at__range=["2021-11-28","2021-12-28"])
  
  # Search for all datasets that are creted by the user Nikola
  f = Filter(type="dataset") & Filter(user="Nikola")
  results = GlobalSearch(filters=f)

  # Chaining function calls for filter, entity, subjects
  s = GlobalSearch()
  
  for result in s.entity(gene="BRCA2"):
      print(result['id'])
  
  # Get subjects with BRCA2 in public vault
  s.filter(vault="public").entity(gene="BRCA2").subjects()
  
  # Get subjects count with BRCA2 in public vault
  s.filter(vault="public").entity(gene="BRCA2").subjects_count()
  
  # Get all vaults with BRCA2 datasets
  s.entity(gene="BRCA2").facets("vault")

[krivi95]

@davecap I'm going to approve this PR, as you're the one who created it and cannot approve it yourself.

I'm not going to merge it yet until everything is double-checked and resolved.

[davecap]

LGTM!