use the CredentialsStore class for the sockethub module
This PR relies on #46 and uses it to enable credentials encryption
for sockethub config
Use remotestorage-node from latest build
Actually, I took it from https://github.com/remotestorage/remotestorage.js/pull/674
because that contains an API change which will be merged into master
as soon as the reviewers finish plowing through the PR backlog
adapt filterAlbumListing to rs.js 0.10
In rs.js, getAll and getListing both return an object, not an array.
rename sockethub -> sockethub-credentials
fix include path and typo in test name
make tests pass
module name sockethubCredentials
Merge branch 'sockethub_CredentialsStore' into ahead
fix tests for sockethub and credentialsstore
Merge branch 'bug/32-fix_pictures.listPublicAlbums' into ahead

Conflicts:
	scripts/lib/remotestorage-node.js
merge documents and build docs