Can now define prefix to be added to project name of pulled Jira tasks

Added a new feature which allows the definition of any prefix which is
prepended to the project name of all tasks pulled from Jira. This can
be used for simple sorting, but also for creating subprojects in
taskwarrior (e.g. "Programming.JiraProject").
Merge pull request #50 from ubuntudroid/develop

Can now define prefix to be added to project name of pulled Jira tasks