Add an Emacs snippet to expand an exported API header file (yasnippet/Emacs).
Add a function to generate the contents of a C header file implementing all methods
declared "native" in Java source file (myutils/Emacs).
Small correction in apih snippet/myutils@expand-native-java-api-to-header-file in order to transform
as succession of non-alphanumeric characters in the API name (snippet parameter 1) into one single
underscore (myutil+myutils/Emacs).
Added missing doctring.
Updated Emacs abbrevs.