Update sdmx-rest-api-tutorial.md
Update sdmx-rest-api-tutorial.md
Update sdmx-rest-api-tutorial.md
Update sdmx-rest-api-tutorial.md
Update sdmx-rest-api-tutorial.md
Update sdmx-rest-api-tutorial.md
Merge pull request #4 from donthebike/master

Reformulating the tutorial text