Fix CommentParser eol issue #184

[moh-hassan]

Fix #184 NewLine in CommentParser for Linux/Windows Environment.
Also, the PR fix a fail of test case when running the test project in Linux (Ubuntu 18.04)

Sprache.Tests.Scenarios.AssemblerTests.CanParseSeceralLines [FAIL]
  Failed Sprache.Tests.Scenarios.AssemblerTests.CanParseSeceralLines [3 ms]
  Error Message:
   Assert.Equal() Failure

[nblumhardt]

Hi! Thanks for this. Looks like the problem is actually in the constructor, line 36? (The newline style there is at odds with the comment). I think a permissive scheme of handling any new-line char would work best here though 🤔