made var names more understandable, added ability to set separatedly content for channels
Merge pull request #105 from YaroslavLitvinov/test-suite-makefile-improved-channels

made var names more understandable...
In test-suite trailing newline shouldn't be wrote into channel, when creating channel contents
Merge pull request #106 from YaroslavLitvinov/test-suite-makefile-improved-channels

In test-suite trailing newline shouldn't be wrote into channel, when cre...
fixed issues #102, #103, tests modified in according to use of append-only channels
Merge pull request #107 from YaroslavLitvinov/issue102_103

fixed issues #102, #103