Improve categorization and search on Inqlude web site

Inqlude is an open, crowd sourced archive of Qt libraries which helps developers to find, install and use Qt libraries easily. A public version of Inqlude runs at http://inqlude.org/. The current website has few options to search libraries under several categories. Hence this requires more use cases tailored to the data collected on Inqlude. The intended project task is to improve categorization and search on Inqlude website in order to offer a better user experience.