Option to discard symlinks

I am using lerna to automatically create virtual subpackages using symbolic links. sloc is unwrapping the symbolic links to the relative path (and recursively walking through the tree which will probably turn my machine into a great heater if I let it run). While it should be possible to work around this, I'm not sure if there is a one-size-fits-all workaround that would still allow for the simplicity of this tool to be preserved. Therefore, my recommendation would be for a command line flag that can treat all symlinks as nonexistant files/folders, for compatibility with lerna.

I don't know how I would implement this in coffee script, having never used it. But if someone else wants to volunteer to answer any stupid questions I have about it, I would be happy to work on this myself.

admin@Admins-MacBook-Pro ~/dev/project/foo $ sloc --exclude node_modules .

---------- Result ------------

Physical : 29310
Source : 20498
Comment : 5779
Single-line comment : 932
Block comment : 4847
Mixed : 90
Empty block comment : 53
Empty : 3176
To Do : 57

Number of files read : 358

----------------------------

admin@Admins-MacBook-Pro ~/dev/project/foo $ mv node_modules ../foo_node_modules
admin@Admins-MacBook-Pro ~/dev/project/foo $ sloc --exclude node_modules .

---------- Result ------------

Physical : 2583
Source : 1965
Comment : 330
Single-line comment : 51
Block comment : 279
Mixed : 4
Empty block comment : 1
Empty : 293
To Do : 0

Number of files read : 16

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Locate the sloc CLI option handling and directory traversal, then reproduce the reported `sloc --exclude node_modules .` behavior with symbolic links. Done means a command-line option can treat symlinks as nonexistent files or folders without recursively following them.

Written by the indexing model from the issue text.