Updating documentation
Fixes #2 - starting time entry with project

The old API took the project as a sub-element in the JSON, v8 accepts the project id as a pid index in the JSON.
Displays project name when showing a time entry

API v8 returns the project id, so a new function was written to find the project by id.
Fixes #7 #5 - fixed date limits to the v8 format

* updated get_time_entries date limits to use the timezone from the .togglrc file as well as comply to the new v8 date format (ISO8601)
* updated the documentation
Fixes #3 - look up default workspace id

* To list the projects, the v8 API requires the workspace id.
* added new function get_user to retrieve the user object which contains the default workspace.
* updated the get_projects to use this new API call.