Fortran-language-server

Fixes
* Fix parsing variable definitions containing separators inside strings, fixes [4](https://github.com/hansec/fortran-language-server/issues/4)
* Fix incorrect variable masking error in functions, fixes [5](https://github.com/hansec/fortran-language-server/issues/5)
* Do not report intrinsic modules as unknown, fixes [2](https://github.com/hansec/fortran-language-server/issues/2) and [3](https://github.com/hansec/fortran-language-server/issues/3)

Improvements
* Do not show warnings for variable masking in interface definitions
* Respect visibility statements when searching for object in scope

Fixes
* Fix bug in incremental document sync with ending newline

Improvements
* Add basic file diagnostics (double declaration, variable masking, unknown USE)
* Indicate optional arguments in autocomplete suggestions
* Detect source code format from file contents instead of extension
* Add support for incremental document synchronization

Fixes
* Fix parsing error when variable definition line is incomplete
* Fix incorrect line handling with open parentheses
* Fix bug when file parsing/hashing fails in workspace initialization

Improvements
* Add support for recursive directory inclusion from "root_path"
* Provide option to skip type members in documentSymbol requests
* Apply visibility statements to objects for autocomplete suggestions
* Filter interface suggestions to only show unique signatures
* Link imported procedures in interface definitions

Fixes
* Fix line continuation handling for free form files with trailing and leading ampersands
* Improve parentheses matching in line parsing

Improvements
* Handle line continuations in language server requests
* Add server version number to help output

Fixes
* Fix bug when parsing files with unicode characters

Improvements
* Include interfaces in autocomplete suggestions
* Restrict autocomplete suggestions by object visibility
* Improve USE statement traversal
* Add notifications for parser failures

Fixes
* Fix bug where parsing errors during workspace initialization could crash the language server