add operator!=

make operator<< and operator>> templated on CharT
add uniform iterator-based seed


[SVN r15588]

libs/random

@@ -1 +1 @@
-Subproject commit a332f69c4414d2d31b57b22197ef33c45e2f9167
+Subproject commit 7910ff9f89318b7c6799fd8b7edc90981af88b74