Release 0.2

Changes

• Added mark commands (mark-block, unmark-block, mark-by-regexp) for
  timeblocks that can be used to reschedule multiple tasks at once
• Replaced ts.el with built-in time API
• Replaced org-ql with own searching and caching functions
• dom.el is now used instead of regexps to fetch and change SVG data (much
  cleaner code)
• Deadline timestamps are now treated as it should be, not as events
• Now, each active timestamp in a heading body is displayed (as event), not only
  the first one
• Added custom variable org-timeblock-files
• Other minor bug fixes and improvements 8)