Compile fixes for Cygwin
Merge pull request #52 from edenhill/cygwin

Compile fixes for Cygwin (issue #25)
Build .so file on Cygwin
Dont use modern 'install' flags (-t) (issue #49)
get rid of warnings in gcc 4.4.3
Merge pull request #53 from vadimg/master

get rid of warnings in gcc 4.4.3