Added reference counting for Rope nodes, fixed memory management bugs.
Added metadata to Rope nodes, starting with line counts.
Fixed off-by-one error in line count.
Fixed memory leak where substrings would not be released.
Added typedefs, merged reference counting with nshepperd/development
Make IEDBuffer a separate library, separate IEDRope from IEDString.
Adds partial support for multiple buffers, cursors, and a CLI.
Fixes bug in insertion
Include stdint.h to fix build errors on Linux
Changed cursor movement keys to jkl; and added forward-delete command (d)
Adds buffer save operation (bs)
Improved documentation, removed rope test methods from ied.c
Fixed error in buffer path allocation, core is now a dynamic library
Fix substring(line-interval) operation