KAA-95: Logging sybsystem for C endpoint sdk
KAA-95: Fix c sdk generation. Add struct containing log upload parameters. Add unit test.
KAA-95: Add description of public functions.
KAA-95: Add error logging during C sdk generation
KAA-95: Remove links to autogenerated sources from CMakeLists.txt which
will be added by sdk generation unit. Remove obsolete call to strlen.
Fix inappropriate print format flag.
Merge branch 'master' into feature/KAA-95
Merge pull request #16 from kaaproject/feature/KAA-95

KAA-95: Logging subsystem for the C SDK
Merge branch 'master', remote-tracking branch 'origin' into feature/KAA-120