updates #3: Performance issues fix. Add new WEKA version in POM file.
update #3: Fix tests.
update #3: Fit tests

Delete temporary file when tests are finished.
updates #3: Bug fix.

Issue was with creating temp file. Java provides system temp files
with file-separator at the end on some platforms, and on others
without file-separator. Work around was implemented.
updates #3: Code clean.
Add tests.
Improve performance of circular buffer.
updates #3: Code clean. Small improvements.
Merge pull request #5 from CERT-Polska/issue-3

Issue #3 : Performance and memory consumption improved.