Enter works as it should in org-mode

Takeover bindings for enter in normal-state. This is necessary for enter
to work properly in tables in org-mode.
Tab uses smart indentation

Rather than just inserting a certain number of spaces, tab indents the
current line to the correct level.
Default to insert-state in calc-mode
Include lib files that ship with evil

goto-chg and undo-tree are currently the only lib files relevant to normal use.