This moves the libespeak source (*.cpp) files to src/libespeak-ng and renames the C files (libespeak, espeak, speak) so they have a .c file extension.
git-svn-id: https://espeak.svn.sourceforge.net/svnroot/espeak/trunk@97 d46cf337-b52f-0410-862d-fd96e6ae7743