Update README

[calebe94]

Expected Behavior

Updated README the newest features.

usage: tbm {URL | OPTION}
e.g: tbm http://web.link
options:
-l: lists bookmarks in $TBM_FILE;
-f: filter bookmarks by chosen word;
-t: filter bookmarks by titles;
-u: filter bookmarks by urls;
-o: opens the $TBM_FILE with your default text editor;
-i: lists bookmarks by id;
-h: shows this usage message.