Update requests to work with current versions of fuseki

[grosscol]

Problem

Recent versions of fuseki require the fully qualified uri for the graph being loaded or queried. Using curl this can be done for GET requests with the --data-urlencode flag. For PUT requests, the url encoding needs to be done by the script because it has to be included in the request url. This is because curl doesn't handle the --data-urlencode flag which appends request parameters when the --data-binary flag is also used.

Solution

The solution here is the same used for ThinkPudding. A function to do the urlencoding is included in the bash script and the query parameter string is constructed prior to calling curl.

Additional Changes

• Remove unused flag for providing causal pathways.
• Provide basic smoke test using ThinkPudding output of the Alice vignette from Vert Ramp Affirmations.
• Avoid depending on a specific version and directory name where fuseki-server is located.
• Add check to make sure fuseki-server is in the PATH.