npmHelpers.install : add new param to link or install module
npmHelpers.fetchManifest : new method to fetch manifest from file or url
npmHelpers.fetchInstall : new method to install module in the preferable way if it s a file or an url
actions.installApp, actions.installPlugin : refactor to install from file or url
add some test package
udate tests
Merge remote-tracking branch 'upstream/master' into install-from-disk

Conflicts:
	cozy-light.js
	tests.js
Merge remote-tracking branch 'upstream/master' into install-from-disk

Conflicts:
	cozy-light.js
	tests.js
fixed fetchManifest termination
fixed fetchInstall termination signature
uninstallApp forwards err
npmHelpers : updated  test suite
actions.installApp, uninstallApp : fix callback termination to foward err
add global fixturesDir
add, lengthen several timeout for slow hardware, internet connection
add new method npmHelpers.link
updated tests
Merge remote-tracking branch 'upstream/master' into install-from-disk

Conflicts:
	cozy-light.js
Merge remote-tracking branch 'upstream/master' into install-from-disk

Conflicts:
	cozy-light.js
Merge remote-tracking branch 'upstream/master' into install-from-disk

Conflicts:
	cozy-light.js
Merge pull request #16 from maboiteaspam/install-from-disk

Install from disk