auto-clean newlines and spaces in repo/archive descriptions

This gives us flexibility in how the blocks of text can be formatted in
config.py, but also provides a more useful format for displaying since the
client can decide where to wrap the text.

tests/description-parsing.py

@@ -0,0 +1,48 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+import os
+import sys
+
+sys.path.insert(1, os.path.join(os.getcwd(), '..', 'fdroidserver'))
+import common
+
+config = common.get_default_config()
+
+testtext = '''
+This is a block of text that has been wrapped to fit nicely in PEP8 style:
+
+GnuPrivacyGuard extends the gpgcli command line tool to bring an integrated
+privacy engine to your Android. It gives you command line access to the entire
+GnuPG suite of encryption software. It also serves as the test bed for
+complete Android integration for all of GnuPG's crypto services, including
+OpenPGP, symmetric encryption, and more.
+
+GPG is GNU’s tool for end-to-end secure communication and encrypted data
+storage. This trusted protocol is the free software alternative to PGP. This
+app is built upon GnuPG 2.1, the new modularized version of GnuPG that now
+supports S/MIME.
+
+GPG aims to provide an integrated experience, so clicking on PGP files should
+"just work". You can also share files to GPG to encrypt them. GPG will also
+respond when you click on a PGP fingerprint URL (one that starts with
+openpgp4fpr:).
+
+Before using GPG, be sure to launch the app and let it finish its installation
+process. Once it has completed, then you're ready to use it. The easiest way
+to get started with GPG is to install [[jackpal.androidterm]]. GPG will
+automatically configure Android Terminal Emulator as long as you have the
+"Allow PATH extensions" settings enabled.
+'''
+
+archive_description = """
+The repository of older versions of applications from the main demo repository.
+"""
+
+
+print('\n\n\n----------------------------------------------------')
+print(common.clean_description(testtext))
+print('\n\n\n----------------------------------------------------')
+print(common.clean_description(archive_description))
+print('\n\n\n----------------------------------------------------')
+print(common.clean_description(config['repo_description']))