Tutorial.rst: Add link to help in "Getting Started with coala"
Tutorial.rst: Add link to help in "Getting Started with coala"

Modified the doc for "Getting Started with coala" by adding a link to
https://coala.io/help in the "Continuing the Journey" section.

Closes #368

coala/documentation,rhemon/documentation,coala/documentation,coala/documentation,AnishHota/documentation,Asnelchristian/documentation,Warewolf96/documentation,kshitijkg01/documentation