changed 'atof' into 'string_metric_parse' for specifying bandwidth
fixed bug with bandwidth limit where small transfers would result in
extreme delays.
Merge branch 'master' of github.com:cooperative-computing-lab/cctools
Fixed bandwidth problem
Added option to have work queue automatically split debug files when
released from a master
New lexer with make syntax.

The new lexer adds some flexibility in the syntax that vanilla make has,
such as:

- Comments and new-lines can be escaped with \
- The above means that all input to makeflow can be multiline.
- Single quotes are taken as literals.
- # does not have effect inside double quotes.
- Recursive expansion of variables.
- Shell expansion when a variable is defined with !=
- Uniform filename lexing. That is, the same rules apply for
  the list of requirements and redirection in command line.
- Variable substitution can be written as $VAR or $(VAR)

This commit is only about the lexing part, thus all of the above is not
yet available in the parsing stage.
Change makeflow to use the new struct lexer_book.
Fixed bug in detecting whether a file to be unlinked was within the workspace.
Initializes chirp path when using -Q quota.

Fixes bug as reported by Austin Walker. chirp_root_path was being initialized
after its first use when using -Q for enforcing quotas.
Merge branch 'master' of github.com:cooperative-computing-lab/cctools
Fix makeflow's segfault, reported by Lauren Assour

A function expected struct dag_lookup_set, but it was getting a
struct dag.