New build script. Remove Netbeans project files from Git.
Common build script for all target platforms.
Replaces auto generated Netbeans Ant build script.
Add build type to properties.
Generate antlr3 code if the corresponding .tokens file is missing.
Delete antlr3 generated files and grammar checksums with the clean target.
Remove obsolete catch block.
Send the 'execution finished' message to stderr
so that the interpreter's output contains only the program's output.
Copy the resource files to the build dir.
Fix duplicate files in JAR issue.
Remove surrounding single quotes from String values.
Complimentary fix for 4f1853ba29ca0c81ae92047c1316fec04411c292.
Merge branch 'unified_build_script'

Simplifies the build process by using the same ant build script for all
target platforms.
For Linux systems under which the system installed versions of the
required libraries should be installed, the 'linux-dist' target should be used
after reviewing the 'build-linux.properties' file.