Fix compile on linux gcc 4.8.1. Add include guard (pragma once) in boolinq.h, remove gmock include directives, add explicit include of <climits>, comment code which use std::vector of const int, clarify typenames inside utility templates.

Fix compile on linux gcc 3.7.2. Change the name of the template paramete...

skipWhile_i improvements

a "lazy" version of the skipWhile_i function

Added the skipWhile and skipWhile_i LINQ functions

skipWhile_i function + tests

an improvement of the skipWhile function

+ created the skipWhile function
+ added tests for skipWhile function

new functions: takeWhile and takeWhile_i

added new LinqObj methods: takeWhile and takeWhile_i with dedicated for
them tests included in TakeWhileRange.cpp