- add logo for inception program
- fix postgresql requirements (install postgresql-devel, freeze psycopg2-binary)

Bug fix:
- ascii error during sphinx process, set LC_CTYPE environment variable to en_US.UTF-8
- fix pip version, requests-cache==0.5.2 and chembl_webresource_client==0.10.2. Bug present in commit prepare version 1.1.2 fc9df15f

Update:
- add chain id in json response from api request

Upgrade user interface
 - Add research button from pockets to network
 - Add help sections with tooltip
 - Correct texts
 - Add pocket pages into homepage

Add iPPI-DB target-centric mode:

- add research and visualization for detected cavities
- add explore mode for PPI pocketome

This new version includes new DB models to store the target-centric information.

Add reference to the iPPI-DB paper (https://doi.org/10.1093/bioinformatics/btaa1091)

multiple fixes to schema.org compound markup

* correct schema.org sameAs syntax in compound cards

* add lablinks files generation code
* fix handling of tests failing if ws unavailable
* misc coding style fixes
* fix sphinx-bibtex configuration

* add a chart representing the evolution of iPPI-DB over the last years
* miscelaneous minor corrections

Multiple minor corrections:

- correct filters on PK and cytotoxicity tests
- provide a more exhaustive summary description of the compounds in the compound list
- layout (CSS) and documentation corrections and improvements

- minor fixes to bioschemas annotations
- fix UI bugs preventing the addition of test results in the contribution wizard

Multiple minor corrections:
* better handling of compound replacement in contributions (only display replaced compounds to admins)
* better display of compound cross-links
* correct LE and LLE properties computation (and the resulting plot)
* handle properly missing missing data for LE-LLE or PCA plots.
* a few corrections on E2E contribution tests
* a few improvements to architecture->complex logic in contribution wizard
* dependencies update

First official release of iPPI-DB (August 6th, 2020)