several changes to emacs init.el:
	+ set tags-table-list (temporary)
    	+ add `notes' subdir to org-agenda-files
    	+ don't confirm evaluating plantuml code in org mode export
    	+ use "reposition" package to define recenter-scroll-offset
    		+ including global C-x n and C-x p bindings
    	+ add plantuml jar
    	+ enable upcase-region