applied typos and spelling error fixes patch from Olly Betts

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15779 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/msw/install.txt

@@ -131,7 +131,7 @@ Makefile notes:
   You MUST use the 'cleanall' target (with FINAL=1 or FINAL=0)
   before making a different configuration, because otherwise
   object files used to build the previous configuration may be
-  used accidentally for the current configuation. You might see
+  used accidentally for the current configuration. You might see
   this manifested in unexpected link errors or warnings. This problem
   doesn't occur when using project files to build wxWindows.
 
@@ -416,7 +416,7 @@ start address').
 32-bit compilation only (partially) supported at present, using SC++ 6.1.
 Some functionality is missing using this compiler (see makefile).
 Add -D__WIN95__ if your SC++ has Windows 95 support, and ignore
-Step (2). 16-bit compilation is left as an excercise for the user!
+Step (2). 16-bit compilation is left as an exercise for the user!
 
 Salford C++ compilation
 -----------------------

docs/msw/todo.txt

@@ -9,7 +9,7 @@ Add automatic line wrap to wxStaticText
 
 Add centring, right justify styles to wxStaticText.
 
-Extend wxLocale to get more locale settings (currence,
+Extend wxLocale to get more locale settings (currency,
 date/time, decimal separator and so on)
 
 LOW PRIORITY (MEDIUM TERM)

docs/msw/winxp.txt

@@ -10,7 +10,7 @@ add the manifest file to your program (this is not at all specific to
 wxWindows programs but is required for all Windows applications).
 
 
-For your convinience, below is an example manifest. It should be put in a
+For your convenience, below is an example manifest. It should be put in a
 file called "yourapp.exe.manifest" and put in the same directory where
 "yourapp.exe" resides. Alternatively, you can include the manifest in your
 applications resource section. Please see the MSDN documentation at