copy hahn banach from old branch

- use convex.v
- does not compile yet

Author: affeldt-aist

_CoqProject

@@ -143,6 +143,8 @@ theories/kernel.v
 theories/pi_irrational.v
 theories/gauss_integral.v
 
+theories/hahn_banach_theorem.v
+
 theories/all_analysis.v
 
 theories/showcase/summability.v

theories/Make

@@ -104,6 +104,9 @@ probability_theory/beta_distribution.v
 probability_theory/probability.v
 
 convex.v
+
+hahn_banach_theorem.v
+
 charge.v
 kernel.v
 pi_irrational.v