Update README

README.txt

@@ -11,24 +11,38 @@ key for Power Search dialog is Ctrl+Shift+S.
 When you run Power Search, it extracts text from all your books on the fly and sends all text to
 the full-text search engine. Plugin will never modify any books and records in Calibre library.
 As a search backend, we are using ElasticSearch. Once the index is created and is up-to-date,
-Power Search is querying search engine and displaying list of books where certain search keywords
-were found. For large libraries, running search for the first time might take a while. Subsequent
-searches though will normally take less than a second.
+Power Search will be querying search engine and display list of books where certain search keywords
+are found. For large libraries, running search for the first time might take a while. Subsequent
+searches will normally take less than a second.
 
 Requirements
 ------------
 
 * ElasticSearch >= 6.x
-    In order to use Power Search Plugin you need to have ElasticSearch service up and running.
-    Please follow the instructions provided on the official website to install it:
-    https://www.elastic.co/guide/en/elasticsearch/reference/current/getting-started-install.html
+    In order to use Power Search Plugin, you need to have ElasticSearch service up and running.
+    For local setup, just download ElasticSearch package from the official website
+    https://www.elastic.co/downloads/elasticsearch and unzip it in any folder.
+
+    If your system stays in trusted network (like your home network) and hence you are not much
+    concerned about fulltext data security, you may simplify configuring ElasticSearch by
+    disabling security module. Just go to config/elasticsearch.yml and add or modify following
+    configuration value:
+
+    xpack.security.enabled: false
+
 
 * Pdftotext utility (optional)
     Generally, Power Search Plugin is using Calibre's native converters to build full-text index.
-    However, native PDF conversion is sometimes working too slow. To speed up this process, you
+    However, native PDF conversion is sometimes working too slowly. To speed up this process, you
     can install pdftotext utility and plugin will make use of it. Pdftotext is part of Xpdf and
-    Poppler projects. Specifically for Debian/Ubuntu check for 'xpdf' or 'libpoppler' apt
-    packages.
+    Poppler projects.
+
+    Here are some hints:
+
+    - Xpdf package can be found here (look for "Xpdf command line tools")
+      https://www.xpdfreader.com/download.html
+
+    - For Debian/Ubuntu, check for 'xpdf' or 'libpoppler' apt packages.
 
 Configuring
 -----------
@@ -42,7 +56,8 @@ Configuring
     Example: c:\programs\elasticsearch-7.8.1
     If you plan to run ElasticSearch locally, PowerSearch might be set up to launch it in the
     background when needed. Just point here to the home directory where ElasticSearch is located.
-    Note that in this case PowerSearch will manage to stop ElasticSearch when you close Calibre.
+    Note that in this case PowerSearch will also manage to stop ElasticSearch when you close
+    Calibre.
 
 * Path to pdftotext tool (optional)
     If pdftotext tool can not be found in PATH, enter the full path to pdftotext executable file.