- don't lint either contrib or crypto: these are both externally written
	  directories
	- add additional linters for spelling (check common typos like teh ->
	  the)
	- chmod linter checks for executible bit on bad files
	- merge-conflict checks for merge conflict tokens then may have been
	  resolved incorrectly
	- filename checks for back characters in filenames
	- json for json syntax correctness

	- remove history.immutable: it is meaningless on subversion, and causes
	  workflow problems when trying to use git.  It it set to 'true' by
	  default with hg