Improvements for new users.

[UPDATED]   Default submodule to read-only public address.
[ADDED]     Detect when jq is missing and emit a useful message.
[UPDATED]   API submodule update.

.gitmodules

@@ -1,3 +1,3 @@
 [submodule "api"]
 	path = api
-	url = git@gitlab.com:spectre.app/api.git
+	url = https://gitlab.com/spectre.app/api.git

README.md

@@ -43,7 +43,7 @@ Spectre's algorithm and implementation is fully documented and licensed Free Sof
 
 ## Components
 
-The source is broken down into several components:
+The source is broken down into several components, each hosted in their own repository. Submodules are used to correlate dependencies.
 
  - [api](https://gitlab.com/spectre.app/api): The algorithm's reference implementation and API library.  There is a C, Java and W3C interface.
  - [cli](https://gitlab.com/spectre.app/cli): The official command-line interface for POSIX systems.

api

@@ -1 +1 @@
-Subproject commit 61bc1b23d37290a23f9250b10aa43cd8d4148e45
+Subproject commit 06243e2673ffa4b050c957276d6cb18b0feb981f

spectre-cli-tests

@@ -69,6 +69,11 @@ spectre_expect() {
                 done < "$file"
             ;;
             json)
+                if ! hash jq 2>/dev/null; then
+                    printf >&2 "Error: jq not installed. Please install through your package manager or from https://stedolan.github.io/jq/\n"
+                    exit 1
+                fi
+
                 case $purpose in
                     a*) result=$(jq -r ".sites.\"$site\".password") ;;
                     i*) [[ $type && $type != none ]] \