ci: add ci and update readme

Changelog is not required anymore. I don't expect much update, and will
simply be set in the version annotations if needed.

.drone.yml

@@ -0,0 +1,9 @@
+kind: pipeline
+name: default
+
+steps:
+- name: test
+  image: crystallang/crystal:latest
+  environment:
+  commands:
+  - crystal spec

.gitignore

@@ -2,6 +2,3 @@
 /libs/
 /.crystal/
 /.shards/
-
-
-/CrystalEmail

CHANGELOG

@@ -1,17 +0,0 @@
-v0.2.4
-  * Update README
-  * Improve specs
-  * Fix Rfc1123::Public bug (at least 2 char for the root domain)
-  * Fix format
-
-v0.2.3
-    * Fix minor mistakes in module String
-    * Add String helpers
-    * Add RfcXXXX::Public versions for internet usage
-    * Add new specs
-
-v0.2.2.2
-    * Fix License
-
-v0.2.2.1
-    * Initialize the project, based on RubyEmail (https://github.com/Nephos/RubyEmail)

README.md

@@ -1,7 +1,9 @@
-**Migrated to <https://git.sceptique.eu/Sceptique/CrystalEmail>**
-
 # A RFC compliant Email validator
 
+[![Build Status](https://drone.sceptique.eu/api/badges/Sceptique/CrystalEmail/status.svg)](https://drone.sceptique.eu/Sceptique/CrystalEmail)
+
+**Migrated to <https://git.sceptique.eu/Sceptique/CrystalEmail>**
+
 #### Prelude
 - What is an [Email Address](https://en.wikipedia.org/wiki/Email_address) ?
 - What is a [Domain Name](https://en.wikipedia.org/wiki/Hostname) ?
@@ -22,7 +24,7 @@
 
 ## Installation
 
-Works with crystal 0.17 - 0.27.0
+Tested with crystal 0.17 - 1.1.0
 
 Add this to your application's `shard.yml`: