Merge branch 'script-processors'

This branch improves the script framework, adding a new
ScriptProcessor plugin so that scripts can be preprocessed
(in a way similar to the C preprocessor) prior to execution.

The parameter declaration syntax has been changed:

    #@input String name
    #@output String greeting

The old syntax is still supported, but the new syntax will mesh better
with other similar preprocessing directives such as:

    #@repository("https://maven.imagej.net/content/groups/public")
    #@dependency("net.imagej:imagej:2.0.0-rc-60")

(See the new scijava/scijava-grab repository for this feature.)

This branch also adds a new "shebang" syntax to declare language; e.g.:

    #!groovy

So now it is no longer necessary to provide a dummy pseudo-path just
so the script framework can glean the language from the extension.

In all of these cases, the directives are stripped from the script
prior to execution (replaced with blank lines), to avoid confusing
the script engine itself.

The script processing mechanism itself is very general, allowing
processors to arbitrary mutate lines of scripts, so in the future,
this mechanism could allow for a variety of other neat features.

Author: ctrueden

pom.xml

@@ -10,7 +10,7 @@
 	</parent>
 
 	<artifactId>scijava-common</artifactId>
-	<version>2.63.1-SNAPSHOT</version>
+	<version>2.64.0-SNAPSHOT</version>
 
 	<name>SciJava Common</name>
 	<description>SciJava Common is a shared library for SciJava software. It provides a plugin framework, with an extensible mechanism for service discovery, backed by its own annotation processor, so that plugins can be loaded dynamically. It is used by downstream projects in the SciJava ecosystem, such as ImageJ and SCIFIO.</description>

src/main/java/org/scijava/plugin/PTService.java

@@ -40,7 +40,7 @@
  * <p>
  * There are many kinds of services, but most of them share one common
  * characteristic: they provide API specific to a particular type of plugin. A
- * few examples from ImageJ:
+ * few examples:
  * </p>
  * <ul>
  * <li>The {@link org.scijava.command.CommandService} works with

src/main/java/org/scijava/script/DefaultScriptService.java

@@ -62,6 +62,7 @@
 import org.scijava.plugin.Plugin;
 import org.scijava.plugin.PluginService;
 import org.scijava.plugin.SciJavaPlugin;
+import org.scijava.script.process.ScriptProcessorService;
 import org.scijava.service.Service;
 import org.scijava.util.ClassUtils;
 import org.scijava.util.ColorRGB;
@@ -90,6 +91,9 @@ public class DefaultScriptService extends
 	@Parameter
 	private AppService appService;
 
+	@Parameter
+	private ScriptProcessorService scriptProcessorService;
+
 	@Parameter
 	private ParseService parser;