Merge pull request #2 from tfoote/cleanup

switch to curl from wget
Update README.md
Update README.md
OpenEmbedded depends on wget. Use an external volume to store the built images (deploy directory)
update permissions on output directory due to bug in docker always writing out wiht UID 1000
Merge pull request #3 from tfoote/permissions

update permissions on output directory due to bug in docker always writi...
Merge branch 'docker' of github.com:esteve/jenkins_scripts into docker
Fix directory clash
Added a more explanatory help
Add shared volume for APT cache. Added support for Docker in Trusty (binary is named docker.io, not docker)
Removed unused arch argument
Expand all paths
Added OpenEmbeded Docker script
Removed log and output path variables. Make sure conf directory exists
Added dependency on libsdl1.2-dev
basic source build test working
changing filename
don't duplicate the bootstrap cycle
creating a generic template evaluator for use in source builds
adding work around for not UID 1000