Multiple fixes

* PDO shell improvements: .query command, -r and --db on command
  line to read commands from file or preselect database.
* Updated build scripts and readme

README.md

@@ -5,10 +5,14 @@ database migrations and project deployment.
 
 ## Installation
 
-~~Download `spark.phar` and make it executable. If desired, alias `spark=spark.phar`.~~
-~~You may also want to alias `sparksh='spark repl'`.~~
+System Requirements:
 
-Download the latest release from [dev.noccylabs.info](https://dev.noccylabs.info/noccy/php-spark/releases)
+* PHP 8.0 or later (php-cli)
+* Linux or other POSIX compatible OS. Probably. May work on MacOS!
+
+### From dist package
+
+Download the latest dist release from [dev.noccylabs.info](https://dev.noccylabs.info/noccy/php-spark/releases)
 and extract it into a directory somewhere, such as `/tmp`:
 
 ```
@@ -28,6 +32,43 @@ the `sparkplug`, `sparker`, `sparkres` and `sparksh` aliases. You can then
 install any new plugins into `~/opt/spark/plugins` and enable them in your
 projects with `sparkplug --enable the.plugin.name`.
 
+### From installer
+
+Download the latest installer release (the one that ends in `.run`)
+from [dev.noccylabs.info](https://dev.noccylabs.info/noccy/php-spark/releases)
+and make it executable:
+
+```
+$ chmod +x spark-0.1.0-dist.run
+$ ./spark-0.1.0-dist.run
+```
+
+Follow the instructions, select Yes when prompted to proceed with the installation.
+
+### From source
+
+Download the latest source release from [dev.noccylabs.info](https://dev.noccylabs.info/noccy/php-spark/releases)
+and extract it into a directory somewhere, such as `~/src/spark`. You can then build spark, using spark:
+
+```
+$ unzip -d ~/src/spark spark-0.1.0-src.zip
+$ cd ~/src/spark
+$ bin/spark run build
+```
+
+You can now install `spark.phar` where desired, and place the `plugins` directory in
+a good place. You want to add the following to your `.bashrc` or similar:
+
+```
+export SPARK_PLUGINS="<path-to-plugins-dir>"
+# If you don't want to rename the .phar for some reason. Skip otherwise!
+alias spark=spark.phar
+# Useful aliases
+alias sparksh=spark repl
+alias sparkplug=spark plugins
+alias sparkpipe=spark pipe
+```
+
 ## Using Spark
 
 ### The easy way