Clean and proper directory structure

Doxyfile

@@ -74,7 +74,7 @@ PROJECT_ICON           =
 # entered, it will be relative to the location where Doxygen was started. If
 # left blank the current directory will be used.
 
-OUTPUT_DIRECTORY       = build/docs
+OUTPUT_DIRECTORY       = ./build/docs
 
 # If the CREATE_SUBDIRS tag is set to YES then Doxygen will create up to 4096
 # sub-directories (in 2 levels) under the output directory of each output format
@@ -991,8 +991,7 @@ WARN_LOGFILE           =
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = vst.h \
-                         vst.hpp \
+INPUT                  = include/ \
                          README.md
 
 # This tag can be used to specify the character encoding of the source files
@@ -2533,7 +2532,8 @@ INCLUDE_FILE_PATTERNS  =
 # recursively expanded use the := operator instead of the = operator.
 # This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
 
-PREDEFINED             =
+PREDEFINED             = __cplusplus:=999999L \
+                         __STDC_VERSION__:=999999L
 
 # If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this
 # tag can be used to specify a list of macro names that should be expanded. The