Add Travis configuration to enable travis builds

Also add build status badge to README file
Disabling tests related to creating an image
Merge pull request #258 from mtnbikenc/issue-257-disable-image-tests

Fixes #257 Disabling tests related to creating an image
Add fuseiso package to travis.yml
Added TEST_MODE=true to suppress the BSON error messages.
Removed install directive for fuseiso until we sort out mounting issue on travis
Merge pull request #253 from ap1kenobi/travis_ci_setup

Add Travis configuration to enable travis builds
Registers a node prior to performing dependant tests
Implements POST /node/register test
Implements GET /node/checkin test
Enables GET /node/{uuid} test
Fixes #259
Merge pull request #260 from mtnbikenc/issue-259-node-tests

Fixes #259 - Registers a node prior to performing dependant tests