Merge pull request #24 from wilas/stable

Stable
update docs
Merge branch 'master' of github.com:wilas/vbkick
issue link test
update issues links
better required options check function
better cleaning scp files and directories
check whether all pkt in *_transport can be transported before starting transpor. sth
added option to not start local webserver, e.g. remote host is used instead; closes #25
definition file name as 3rd optional argument is accepted; closes #26
update readme
extra variables after %HOST% in launch commands
check whether VM exist before updating guest additions
update docs
check whether process exist and accept signals before sending SIGTERM - closes #27
update webserver_status before sleep to avoid unconsistency when SIGINT is sent during sleep
update webserver_status before ps-check to avoid unconsistency when SIGINT is sent during check
vbkick report error when command exec via ssh fail and exit; closes #28
replace [ by [[; closes #29
refactoring some if statements to reduce indent-number