terminal colors, multi-line strings; bump to 0.8

src/main/kotlin/blitz/term/AnsiiStr.kt

@@ -0,0 +1,16 @@
+package blitz.term
+
+class AnsiiMode(internal val values: MutableList<Int>) {
+    constructor(mo: Int): this(mutableListOf(mo))
+
+    operator fun plus(other: AnsiiMode): AnsiiMode =
+        AnsiiMode((values + other.values).toMutableList())
+}
+
+private val escape = (27).toChar()
+
+fun ansiiStr(str: String, vararg modes: AnsiiMode) =
+    if (modes.isEmpty())
+        str
+    else
+        "$escape[${modes.flatMap { it.values }.joinToString(separator = ";")}m$str$escape[0m"