Add file hash and compare functions
Remove accept globing expressions
Copy directories
New should_exist and should_not_exist options; Rename fail callback to skip
Check source before extracting
New move function
Test source as a string arg in mkdir
Support md5 for directory
Allow merge to be called without a context
Scratch path now in "/tmp/mecano-test"
Improve hash doc for directories
Fix misc tests
New hash function for strings
Don't increment counter if rendered source is identical
New write command