minor fixes according to task list

[raagavi158]

Addresses the following issues:

• change Entry Index to Entry ID
• Changing
  • matchedMentions to “mentionedNamesWithEntryID”
  • unmatchedMentions to “mentionedNamesWithNoEntryID”
  • matchedMentionsEntryIndexes to “IDmatchesForMentionedNamesWithEntryID”
• change LICENSE language from all TSV tables
• adding to all Explorer entries that have as their Origin either ‘From the Dictionary’ or ‘Extracted from heading’ a box with a text and a link to Mellon Archives.
• formatting landing page boxes