search_api_attachments 7.x-1.7

This is the Search API Attachments 1.7 release, fixing some bugs and adding some features.

Main features since 1.6 release are:

• There is now a views exposable filter to choose to serach also in files or not.
• Support the node_reference fields
• Allow alternative tools to crawl attachments for text (python pdf2text + native pdftotext)

Notable changes since release 1.6:

• Issue #2602884 by Grimreaper, izus: replace static 'java' by variable
• Add messages to form_set_error.
• Issue #2507491 by izus: Ensure there are fields to exclude before doing it.
• Issue #2507491 by izus: Document views include/exclude attachments search filter support for D7
• Issue #2549109 by Grimreaper, jessehs, izus: Support the node_reference fields as well
• Issue #2507491 by dolu, izus, Grimreaper: Exposed option to include search in files or not for views
• Issue #2559787 by Grimreaper, izus: Not managing single-value file fields
• Issue #2501309 by Grimreaper, izus, generalredneck: Allow alternative tools to crawl attachments for text
• Issue #2507751 by guile2912, izus: Not using the conf value "search_api_attachments_java"