Add to documentation

Note about columns view
Add exclude-todo-state & include-todo-state args to org-dotemacs-extract-subtrees

Altered items:
org-dotemacs-extract-subtrees
Add org-dotemacs-include-todo & org-dotemacs-exclude-todo options

Altered items:
org-dotemacs-include-todo, org-dotemacs-exclude-todo
Bugfix: change defun to defun* in org-dotemacs-extract-subtrees

Altered items:
org-dotemacs-extract-subtrees, org-dotemacs-load-blocks