Added functions to map symbols access levels to and from ICAT.

    Can now search by combination of metadata and/or access level

    Added zone hint to ACL listing

    Return iRODS CAT_INVALID_ARGUMENT where appropriate
Added result printing option flags

Made printing of AVUs and ACLs in results optional via CLI arguments

Fixed memory leak in query inputs (caused by key-value pairs)
Added Sphinx documentation build

Added log rotation to zlog config to prevent zlog trying to use the
installed configuration file as a lock file (and failing because it is
read-only).
Added missing baton.pc.in and removed from .gitignore the pattern
matching *.in

Removed print_json calls from tests.
Added missing call to list collection AVUs.

Added comments about the ZLOG_CONF variable.

Fixed documentation typo.
When listing a collection, list the collection itself as the first of
the returned collection values, followed by its contained collections.
Fixed memory leak caused by nit freeing query outputs

Added free_query_output function
Documentation updates
Added targets for code test coverage using lcov
Merge pull request #36 from keithj/devel

Final changes for release 0.7.0