Changeset 60:6ec5dbed8f18 in lemon for test

Reworked documentation generation and installation.
Details:

• Remove configure flag used to disable the automatic generation of the documentation when istalling.
• Now 'make html' generates the documentation.
• Now 'make install' does not install the documentation, 'make install-html' does that. The latter two changes follow newer automake conventions.
• This also fixes the bug that caused the documentation missing from the tarball.