Fixed
- Fix parser error with uppercase characters in scope names, fixes [11](https://github.com/hansec/fortran-language-server/issues/11)
- Add support for object names with a leading underscore, fixes [9](https://github.com/hansec/fortran-language-server/issues/9)
- Do not report diagnostics inside preprocessor if statements, fixes [7](https://github.com/hansec/fortran-language-server/issues/7)