TODO.md in interval_notation-0.1.3 vs TODO.md in interval_notation-0.2.0

@@ -3,5 +3,6 @@
 * Visualization in console and in IRuby (how to scale into 80-symbol or 1200px screen); SVG; TeX formatters
 * Remove old git history related to mTOR project
 * What about working with simgle intervals (their, length, relations etc)?
 * (?) Make it possible to use intervals with non-numeric objects to be possible to use math expressions as interval boundaries
 * May be we should check that boundary is an actual number, not a NaN
+* Make use of basic intervals (implement #coerce and make oo|co|pt|... return BasicIntervals)
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