Updated the configure bash script

- Added options for forcing of GL header and context initialization library.
Updates to the web index page
Added support for building of OALplus into a lib
Multiple changes

- Fixed some problems with building OALplus into a library.
- Updated the spectra example to use OALplus compiled into library.
Merge branch 'develop' into feature-eglplus

Conflicts:
	tools/make_enum_headers.sh
Added support for building of EGLplus into a lib