Cwh Versions Save

• merged PR https://github.com/maxbanton/cwh/pull/50 thanks to @amandas-sukionis
• libraries update

Thanks for @joshbernfeld for his PR https://github.com/maxbanton/cwh/pull/48

• thanks to @mstovicek for making Handler compatible with FingersCrossedHandler
• thanks to @localheinz for a bunch of enhancements and fixes

Fix issue described here https://github.com/maxbanton/cwh/issues/32#issuecomment-376509885

Handler was completely rewritten with focus for native support of batch log entries sending. Some back incompatible changes done.