We don't need to test gcc on OSX

Also upload just pugixml.cpp.gcov to codecov to avoid issues the script has
with old gcov.

Use find -exec instead of xargs to work around differences between xargs on OSX
and Linux.

Use -b option of gcov - for some reason gcov on Travis can't find .gcno files
otherwise (old version?).

And finally enable config=coverage again.

This reverts commit 98713bcb.

Travis multi-OS feature is invite-only for now...

Hopefully OSX defaults to clang so we get as much coverage as before...

git-svn-id: http://pugixml.googlecode.com/svn/trunk@972 99668b35-9821-0410-8761-19e4c4f06640

This expands and replaces the Travis-specific makefile by adding more options and correctly tracking header dependencies.
Also add wchar_t mode test to Travis configuration.



git-svn-id: http://pugixml.googlecode.com/svn/trunk@971 99668b35-9821-0410-8761-19e4c4f06640

git-svn-id: http://pugixml.googlecode.com/svn/trunk@969 99668b35-9821-0410-8761-19e4c4f06640