v2.2.0

Changelog

081419c Add dcokerfiles to run fuzzers
ba0ba11 Fix the following Issues:
ca5e96b Merge pull request #11 from kjk/improve-filecopy
6748d4e Merge pull request #12 from kjk/url-escape
2038de3 Merge pull request #13 from kjk/robust-cache
ab3d785 Merge pull request #14 from kjk/tweaks
1f30c2f bugfixes in job creation
4082941 escape url query args
e7ce4e5 make fileCopy more robust
70786f8 portable filepath operations; misc tweaks
6c85a01 try to prevent being stuck forever if cache file gets corrupted