stringi: stringi_0.5-3

[BACKWARD INCOMPATIBILITY] stri_install_check and stri_install_icudt are now deprecated. From now on they are supposed to be used only by the stringi installer. [BUGFIX] #176: a patch for sys/feature_tests.h no longer included (the original file was copyrighted by Sun Microsystems); fixed the Compiler or options invalid for pre-UNIX 03 X/Open applications and pre-2001 POSIX applications error by forcing _XPG6 conformance. [BUGFIX] #174: stri_paste() did not generate any warning when the recycling rule is violated and sep=="". [BUGFIX] #170: setDataDirectory no longer called if our ICU src bundle is not used (this used to cause build problems on openSUSE). [BUILD TIME] #169: ./configure now tries to switch to the "standard" C++ compiler if a C++11 one is not properly configured. [BUILD TIME] configure.win (Biarch: TRUE) now mimics autoconf's AC_SUBST and AC_CONFIG_FILES so that the build process is now more similar across different platforms. [NEW FEATURE] stri_info() now also gives information on which ICU4C is used (system or bundle)