Added plugin main file.
Changes description
Added basic settings page that pulls in post types and title and content fields
Tweaks
Completed basic admin and began breaking up into classes.
Tweaked admin
Began working on indexer
Added stemming and creation of term database
Tweaked search
Switch to using two indexes for terms and documents.
Cleaned up code, changed to use less SQL queries
Cleaned up code, now indexing custom fields
Began to add tfidf calculations and search querying.
COmpleted basic tfidf calculator
Search tweaks
Cleaned up code, and now sort results by score properly.
Moved sorting into proper function to clean up code
Merge branch 'tweaking-ordering' into develop
Added simple pagination
Merge branch 'add-results-pagination' into develop