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fixes #131: improve w motion
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a few fixes
improve mode handling when repeating commands via '.' that would enter insert mode if issued manually
start implementing # and ? motions
start implementing CTRL+A and CTRL+X commands (add/subtract count to/from number under the cursor)
#143: N should use ?'s input to search backward
#141: collapse selections after pasting in visual line mode
#140: start implementing /<CR> and ?<CR> (counts won't work at the moment)
minor fix
fixes #147: enter insert mode after S (no count)
fixes #139: add {} delimiters to text objects
Merge remote-tracking branch 'upstream/master'

Conflicts:
	motion_cmds.py