GELF time precision should be millisecond level
Merge pull request #157 from karlvlam/gelf-timefix

GELF time precision should be millisecond level
Added logic to serialize Error objects correctly

This should fix #97.
Fixed unit tests, now with regexes.
Merge pull request #158 from emilecantin/master

Added logic to serialize Error objects correctly
0.6.9
Added an option to compress rolled dateFile logs