version 0.4.2
Merge pull request #32 from hcapitaine/master

Bower registry url and git url are not the same.
Ability to declare repository cache host address
fixes #31
Update read me
Update README.md
Update README.md
Added logging timestamp

fixes #34
Fix undefined package registration
#40
Remove package from package cache also
#38
Added graceful shutdown
fixes #47
Added error handling for pulling not existent package directory
#49
Fix chdir in repo cache pull latests
#49
Logging of exception message and change config in readme to valid
Merge pull request #55 from ArchCC/master

Logging of exception message and change config in readme to valid
Error handling improvement