Adds BLACKBELT_CONFIG_DIR

Holds the path to the config's directory.
Removes removed test
Uses the config directory for relative paths
Adapts tests to work relative to the config file
Documents that paths must be specified in relation to config file
Adds generated manpage
Searching for Workspace and Provisioning Profile is done relative to current directory.
Markdown fix
Adds function that constructs absolute paths
Makes test work with config file change
Fix variable substitution
Merge pull request #5 from blckblt/feature/config_relation

Feature/config relation