implement stat_cache_walk; some minor cleanup
getting rid of references to trailing slashes
fix root directory slash issue; better timing to evaluate different implementations
using path_parent in statcache_prune
Initial final commit for removing trailing slashes
remove commented out lines
remove commented out line
formatting
Merge pull request #94 from pantheon-systems/walk-statcache-pathparent

Includes statcache_walk; fixes issues with checking for trailing slashes and representation of root directory; fixes bug in statcache prune