Adds README for documentation

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+# Documentation
+
+## ViM Guide
+
+
+# File Ops
+
+`:w`: save.
+`:q`: quit.
+`:wq`: save and quit.
+`:q!`: quit without saving.
+
+
+# Pane Management
+
+`:vs`: vertically split the current pane.
+`:sp`: horizontally split the current pane.
+
+`ctrl` + `w` + `h`: move left to next pane.
+`ctrl` + `w` + `j`: move down to next pane.
+`ctrl` + `w` + `k`: move up to next pane.
+`ctrl` + `w` + `l`: move right to next pane.
+
+
+### Insertion & Deletion
+
+`x`: deletes the character beneath the cursor.
+`shift` + `x`: acts as a backspace.
+
+`shift` + `i`: insert at the beginning of a line.
+`shift` + `a`: insert at the end of a line.
+
+`d` + `d`: deletes a line.
+
+`shift` + `o`: inserts above the current line.
+`o`: inserts below the current line.
+
+#### Copy & Paste
+`y` + `y`: copies the current line.
+`p`: pastes whatever is on the clipboard beneath current line.
+`shift` + `p`: pastes whatever is on the clipboard above current line.
+
+
+### Search
+
+`/`: search forward for a seqeuence.
+`?`: search backward for a seqeuence.
+
+
+### Movement
+
+#### basics
+
+`h`: left-arrow
+`j`: down-arrow
+`k`: up-arrow
+`l`: right-arrow
+
+`w`: moves forward one word.
+`b`: moves backward one word.
+`e`: moves to the end of a word.
+
+
+#### zip-around
+
+`*`: finds the next occurrence of the word that is beneath the cursor.
+`#`: does the reverse.
+
+`{`: move up a paragraph.
+`}`: move down a paragraph.
+
+`%`: jump to matching bracket.
+
+`:<INT>`: jumps to the line number, `<INT>`.
+
+
+### Visual
+`shift` + `v`: enter full-line visual mode.
+`v`: enter visual mode.
+
+
+### Bonus: powerful sequences
+
+`d` + `t` + `<ANY_CHARACTER>`: deletes until the next occurrence of
+`<ANY_CHARACTER>`.
+
+`c` + `i` + `<ANY_BRACKET>`: changes the inner content of the nearest
+matching bracket.
+
+`j` + `j`: map this key to the <Esc> function
+