need to see if project exists before creating
check before delete if project exists
add job existence check

create_copy:
- template must exist
- new job must not already exist
add optional proxy parameter

optional proxy parameter for explicit proxy settings divergent to the system
settings
added proxy parameter
Change console script entry points

ajk console scripts replaced by autojenkins
one executable for all commands
insert docopt header

first changes for switch from optparse to docopt
insert docopt usage and options part
List-Command via docopt

remove options first.
Remove old staticmethod list()
Add some http-error handling
Delete-command via docopt

add some error handling
Remove old staticmethod delete()
Add job not buildable exception

check if a job exist before it should be build
Build-command via docopt

add some error handling
Remove old staticmethod build()
Add some error handling

line length fix
Create-command via docopt

add some error handling
Fix PEP8
Remove old staticmethod create()
Fix PEP8