More search progress

Coders: @akshoop @nhhughes

- Added 3 lines to build.gradle TaskManager, specifically asking for
lucene-core, lucene-analyzers-common, and lucene-queryparser (This is
all for the Lucene search engine)
- Made methods to create indexes and to search through indexes
- Made a test to search for “sometitle”. It worked! (currently it’s NOT
case sensitive)