Scriptlike: New lib to aid in writing script-like programs

[Nick Sabalausky]

I've released a little one-module utility, Scriptlike, to help simplify 
writing shell script-like programs in D:

   https://github.com/Abscissa/scriptlike

Here's post outlining my motivations for this library (sorry, the CMS 
I'm using ATM generates very long URLs):

http://semitwist.com/articles/article/view/scriptlike-shell-scripting-in-d-annoyances-and-a-library-solution

Current Features:

- A thin wrapper over std.path and std.file that provides a dedicated 
Path type specifically designed for managing file paths in a simple, 
reliable, cross-platform way. No more dealing with slashes, 
paths-with-spaces, calling buildPath, normalizing, or getting paths 
mixed up with ordinary strings.

- Optionally enable automatic command echoing (including shell commands, 
changing/creating directories and 
deleting/copying/moving/linking/renaming both directories and files) by 
setting one simple flag: bool scriptlikeTraceCommands

- Most typical Phobos modules automatically imported. Who needs rows and 
rows of standard lib imports for a mere script?

- Less-pedantic filesystem operations for when you don't care whether it 
exists or not: existsAsFile, existsAsDir, existsAsSymlink, tryRename, 
trySymlink, tryCopy, tryMkdir, tryMkdirRecurse, tryRmdir, 
tryRmdirRecurse, tryRemove: All check whether the source path exists and 
return WITHOUT throwing if there's nothing to do.

- One simple call, runShell, to run a shell command script-style (ie, 
synchronously with forwarded stdout/in/err) from any working directory. 
(Also automatically works around DMD #10863 without waiting for v2.066 - 
BTW, thanks all involved who fixed that.)

- One simple function, fail(string msg), to help you exit with an error 
message in an exception-safe way. (Does require some minor boilerplate 
added to your main().)