fix bug on CharUtil
add SignatureEstimator and a placeholder of BerkeleySignatureEstimator
change return types in StringUtil (int -> size_t)
Support loading gzip files as models
Append ".gz" in error messages come from gz files
Remove arguments of AM_INIT_AUTOMAKE which are deprecated
See http://www.gnu.org/software/automake/manual/automake.html#Modernize-AM_005fINIT_005fAUTOMAKE-invocation
add some functions into CharUtil
add prefix and suffix checker into StringUtil
add signature estimation process
Merge pull request #4 from vbkaisetsu/fix-autoconf

Remove arguments of AM_INIT_AUTOMAKE which are deprecated
Fix order of includes
Make gz file paths in the beginning of loading procedures
Merge pull request #3 from vbkaisetsu/load-gz

Support loading gzip files as models
fix README
separate lexicon smoothing into LexiconSmoother
add lexicon scaling
librarize
Fix file names of headers
Fix Makefile to run "make dist" collectly
Add REFERENCES to EXTRA_DIST