Updated README.md
Added ShowTasks handler + template (lists all Tasks at /tasks)
Added Postgres connection, 'tasks' table creation @ types/db.go
Tasks: Converted storage from map[string]*Task{} to Postgres
README.md: Updated Task creation curl command
README.md: Added setup instructions
Made README.md slightly more helpful
More README.md enhancements
Added Tasks.{Completed,CompletionDate} fields and fixed affected code
(mostly method calls)
Fixed DeleteTask function (says 'Task not found' when
attemptedly-deleted Task doesn't exist instead of saying it was
deleted)
Tweaked showTasksTmpl whitespace
More whitespace perfectionism
README.md now includes example curl API calls for Task CRUD
Improved name of showTasksTmpl template
Simplified (*Task).updateFields method (now defined in terms of
(*Task).insertFields)
All or almost all Tasks are now named 't'
addTimestamps func now sets CompletionDate if t.Completed &&
t.CompletionDate == nil
Created ./helpers/time.go and added Now() function to it (yields
current time in LA rounded to the nearest second)
Go now uses LA time as the default timezone
DeleteTask now uses ErrTaskNotFound