Fix issue 24. Extract warnings from the build log and unconditionally display them, even if the overall build does not fail.
Build log extended to contain stderr also, not just stdout.
Initial patch supplied by Ashok P. Nadkarni as part of the feature request.
Issue 24 tweak. Suppress output when list of warnings is empty.
Inserted an over-ridable output hook for package messaging.
Merge branch 'issue-24'
Modified merged code to use the new print hook.
Merge pull request #25 from apnadkarni/master

Changes to add "copy" option to copy config for one platform to another
Tweak the documentation of the new "configuration copy" feature a bit.
Documented the new output hook critcl::print, and fixed a sentence in the documentation of critcl::msg.
Version bump to 3.1.7. Code and documentation.
Added links to the reference documentation into the introduction.
Unified use of letter case for Critcl in the document titles.
Regenerated documentation for release.
Fixed issue with package indices generated for Tcl 8.4.
Join the list of commands with semi-colon, not newline.
Version numbers bumped to 3.1.8 for next release.
Still have to look into the open issue #26.
Alternate fix for bug #21 to also satisfy bug #26.
Updated documentation with latest change.
Merge remote-tracking branch 'remotes/upstream/master'