* Delete PascalABC.NET Lib files from CompilationSamples
* Delete SPython Lib files from CompilationSamples
* Delete DataFrameABC from CompilationSamples
* Delete copying Lib files in TestRunner + set up copying CodeExamples in separate dir
* Fix div and mod in SPython
* Fix generic type names search in SPython symbol table
* Small fixes
* Add few checks in Intellisense
* Add comments about units compilation order
* Implement bool to int and int to bool implicit conversion for SPython
* Change "and", "or" and "not" operations to be logical in SPython
* Add standard functions' overloads (all, any, sum)
* Refactor language information classes
* Implement SimpleLanguageInformation abstract class
* Move some properties to SimpleLanguageInformation
* Implement format and debug buttons disabling if Intellisense is not supported for current language
* Add Intellisense available check in FormsExtensions to deactivate menu items if needed
* Change function interfaces in VisibilityService
* Replace CodeCompletionController.CurrentParser null checks with IntellisenseAvailable method call
* Refactor IParser and BaseParser to deduplicate code
* Fix BuildTreeInSpecialMode in SPythonParser
* Add SimpleParser class for new languages without Intellisense
* Delete duplicate SetDebugButtonsEnabled function
* Add Intellisense available check in RunService when attaching debugger
* Delete inner check in SetDebugButtonsEnabled to improve architecture
* Change CurrentParser property in CodeCompletion to be CurrentLanguage
* Divide ILanguageInformation into two interfaces (creating new ILanguageIntellisenseSupport)
* Fix LanguageIntellisenseSupport initialization in BaseLanguage
* Fix RunService fictive_attach logic
* Disable Intellisense parsing for languages without Intellisense support
* Add DefaultLanguageInformation abstract class
* Add default implementation for SetSemanticConstants in BaseLanguage
* Simplify IParser interface
* Update developer guide documentation
* Replace languageCaseSensitive by languageName data in PCU and caseSensitive parameters in Compiler functions
* Implement SearchDirectories filling in Compiler and move SPython standard modules to their new directory
* Implement search using current language extension first in Compiler
* Delete LibForVB folder and update TestRunner to support different Lib dirs
* Update installer scripts to create separate Lib folder for SPython
* Take into account Lib dirs not found
* Delete supportedSourceFiles variable in Compiler
* Delete unused functions from LanguageIntegrator
