v0.31.0

95efd68 move help content to erlide.github.io
3a1b354 #260 - disable invalid runtimes
5ea151a move tracing and cover plugins to erlide core; erlang code to kernel
76e235f move all erlang sources to an own repository; keep only beams here
d4800e6 update jinterface to 1.6.1
c331a22 add handly to targets
d2637f4 update xtend libs to 2.9.1
19e347d #246 - runtime version numbers may use _ as delimiter
806d2a3 #235 - recognize more types of version numbers
7c2402f #241 - remove headless feature
cc94717 #238 - cache hostname values to speed up startup
2e401bf debugger: catch missing bundles
40f0552 #233 - improve launch "runtime" tab to make it clearer
75c8fb8 #230 - detect kerl and its installations