[SCons] Fix a missing SCons dependency

Cherry-pick of trunk r2734.

git-svn-id: https://cantera.googlecode.com/svn/cantera/branches/2.1@2758 02a645c2-efd0-11dd-984d-ab748d24aa7e
[SCons] Simplify treatment of sydep1.h and signal1.h

We don't actually have system-dependent versions of these headers, so just put
the templates in place directly. This is also a workaround for a SCons bug on
Cygwin.

Cherry-pick of trunk r2735.

git-svn-id: https://cantera.googlecode.com/svn/cantera/branches/2.1@2759 02a645c2-efd0-11dd-984d-ab748d24aa7e
[SCons] Correctly identify Cygwin builds

The correct preprocessor macro to use is the one provided by the
compiler, '__CYGWIN__'.

Cherry-pick of trunk r2736.

git-svn-id: https://cantera.googlecode.com/svn/cantera/branches/2.1@2760 02a645c2-efd0-11dd-984d-ab748d24aa7e
Fix compilation errors with isnan/isinf using Cygwin's GCC

Cherry-pick of trunk r2737.

git-svn-id: https://cantera.googlecode.com/svn/cantera/branches/2.1@2761 02a645c2-efd0-11dd-984d-ab748d24aa7e
[SCons] Fix library linking issues under Cygwin

Partial cherry-pick of trunk r2738.

git-svn-id: https://cantera.googlecode.com/svn/cantera/branches/2.1@2762 02a645c2-efd0-11dd-984d-ab748d24aa7e
[SCons] Workaround for SCons bug under Cygwin

See SCons Issue 2911.
http://scons.tigris.org/issues/show_bug.cgi?id=2911

Cherry-pick of trunk r2739.

git-svn-id: https://cantera.googlecode.com/svn/cantera/branches/2.1@2763 02a645c2-efd0-11dd-984d-ab748d24aa7e
[SCons] Ensure that 'compilerOpt' is always defined

git-svn-id: https://cantera.googlecode.com/svn/cantera/branches/2.1@2764 02a645c2-efd0-11dd-984d-ab748d24aa7e
[SCons] Always link to static standard libraries with MinGW

git-svn-id: https://cantera.googlecode.com/svn/cantera/branches/2.1@2765 02a645c2-efd0-11dd-984d-ab748d24aa7e
Mention downloads on Sourceforge in README

git-svn-id: https://cantera.googlecode.com/svn/cantera/branches/2.1@2766 02a645c2-efd0-11dd-984d-ab748d24aa7e
Bump version to 2.1.1

git-svn-id: https://cantera.googlecode.com/svn/cantera/branches/2.1@2767 02a645c2-efd0-11dd-984d-ab748d24aa7e
[Doc] Point to SourceForge for downloads

git-svn-id: https://cantera.googlecode.com/svn/cantera/branches/2.1@2768 02a645c2-efd0-11dd-984d-ab748d24aa7e