rewrite circleci config (#558)

* rewrite circleci config with better syntax

and try using grcov for coverage

* attempt to use less memory and to rerun if memory lack

* actually remove use of kcov

* use the right var

* try looping

* run test serialized

* use feature where we should and make macro path independant

* cargo fmt and remove some '"'

* add zip to dependancies

* reduce number of used thread after first failure

* push translations to crowdin on commit to master

* don't cache result of coverage

.circleci/images/plume-buildenv/cargo_config

@@ -1,3 +1,3 @@
 [target.x86_64-unknown-linux-gnu]
 # link dead code for coverage, attempt to reduce linking memory usage to not get killed
-rustflags = ["-Clink-dead-code", "-Clink-args=-Xlinker --no-keep-memory -Xlinker --reduce-memory-overheads"]
+rustflags = ["-Clink-args=-Xlinker --no-keep-memory -Xlinker --reduce-memory-overheads"]