first draft
minor cleanup
cleanup
fix up the C bits to compile
build c/cursor and running tests
wip
Fix pointer arithematic.
adds cursor iterate test
Add Cursor.Next() to C cursor.
Clean up
Merge branch 'c_cursor' of github.com:Shopify/bolt into c_cursor

Conflicts:
	c/cursor_test.go
tests pass
hide the cursor stack details behind function calls (pop/push/current)
trying to fix large seek
all tests pass
Merge pull request #134 from Shopify/c_cursor

C cursor