Two typos fixed

[SVN r32711]

more/whos_using/using.qbk

@@ -119,12 +119,12 @@ spending into boost."]]
    visualization engine and an intuitive GUI. This combination helps a human eye 
    guide the application of statistical tools and spot the patterns that 
    might otherwise remain hidden.
-['"We are using following boost libraries:
+['"We are using the following boost libraries:
 [@../../libs/date_time/index.html Date Time],
 [@../../libs/variant/index.html Variant],
 [@../../libs/regex/index.html Regex],
 [@../../libs/format/index.html Format],
-[@../../libs/algorithm/string/index.html String Algoritms],
+[@../../libs/algorithm/string/index.html String Algorithms],
 [@../../libs/smart_ptr/index.html Smart Pointers],
 [@../../libs/mpl/index.html MPL],
 [@../../libs/type_traits/index.html Type Traits],