Update README.md

Author: HaraldHofstaetter

README.md

@@ -20,7 +20,7 @@ Then 'Quadmath_examples' will be listed in the JuliaBox home screen. The example
 +  `ccall` does not treat parameters and returning values of Julia type `Float128` as C type `__float128` as it would
     be appropriate. 
 
-    Unfortunately, this is a bug which cannot easily be fixed. 
+    Unfortunately, this is a bug which cannot easily be fixed without modifying the internals of Julia. 
     The [x86-64 Application Binary Interface](http://www.x86-64.org/documentation.html) 
     says that parameters and returning values of type `__float128` should be passed preferably in the (128 bit long) SSE       floating point registers `xmm0`,...,`xmm7`. However, for the datatype `Float128` defined as
     ```julia
@@ -37,7 +37,7 @@ Then 'Quadmath_examples' will be listed in the JuliaBox home screen. The example
     in C.
 
     A remedy is to implement a wrapper function for each external function with `__float128` parameters or return values,
-    that you want to call by `ccall`. Such a wrapper takes parameters `x` of type `myfloat128` declared as
+    that you want to call with `ccall`. Such a wrapper takes parameters `x` of type `myfloat128` declared as
     ```c
     typedef union
     {