Frontend: fixed explicit receiver kind for dynamic call with implicit dispatch receiver.

Additionally added tests for other cases.
Frontend: allow omit types in lambda parameters of dynamic calls.
Frontend: allow to use the spread operator in dynamic calls.
Frontend: allow omit types in lambda parameters of dynamic call when lambda declareted inside parentheses.
JS test minor: removed 'Inline' from name checkFooBoxWithInlineDirectives

checkFooBoxWithInlineDirectives was moved from InlineTest, but was not renamed
JS test minor: use getNamedArgument for mandatory directive arguments
JS parser: GWT parser copied
JS parser: added original gwt code revision notice
JS parser: auto-reformat JsParser.java
JS parser: updated imports
JS parser minor: removed unused function
JS parser: removed source info creation
JS parser: fixed expression statement mapping
JS parser: added NUMBER_INT token type
JS parser: added insideFunction flag
JS parser: literals creation
JS parser: renamed sourceNameStub to comply with a codestyle (UPPERCASE)
JS parser: added description string to constructor arguments
JS backend: added jsCode test cases
JS backend: added jsCode definition