added --with-libsylph configure option which enables the use of externallibsylph.
implemented Robinson-Fisher method to calculate combined probability.
add AC_CANONICAL_SYSTEM to configure.ac for target variable.
added --enable-windows to configure.
Add GDBM support.Add mode switch for standalone and libsylph app.
implemented trigram filter in wordsep-filter.
introduced limit of max token length.
addes SQLite3 support.
added check data.
check for QDBM on configure.
added built-in libsylph, and use it from textcontent-filter.c.
implemented basic bayesian filter.
bayes-filter.c: added word-count func.
implemented simple stopword.
added a function to read message files.
Initial commit