+0.5.v - dd/mm/yyy - bugfix release
+ * mstyle support in notation for text color, font size
+ * AutoGui now scales fonts to the correct user-requested size Non
+ * linear pattern matching from the level of terms to the
+ one of content in interpretation command (if the same variable name
+ is used, the two captured terms must be alpha equivalent to match)
+0.5.3 - 23/7/2008 - bugfix release
+ * many fixes concerning the CProp hiearchy
+ * coercion database simplified
+ * coercion hiding now works properly for coercions to funclass
+ * triangular pullback works better with coercions to the function space
+ * notation for lists fixed to add a break point after the separator
+ * notation for the existential is now user definable
+ * \infrule layout added, allows to display readable fractions
+ * better window for terms grammar and TeX/Unicode
+ * fixed a bug in the positivity check not considering some subterms
+ * fixed some GUI glitches thanks to glade-3
+
0.5.2 - 2/7/2008 - better-usability-for-the-working-constructivist release
* refinement of match fixed to prevent useless unfolding,
head_beta_reduce is used instead of whd ~delta:true