skip test if no vim found
new load_function_dir
documention load_function_dir
changelog
v0.2.0

 [BUG FIXES]
 - Tests skipped if vim not found, or not compiled with perl support.

 [ENHANCEMENTS]
 - Added 'load_function_dir()' loading mechanism.

 [STATISTICS]
 - code churn: 3 files changed, 106 insertions(+), 32 deletions(-)