bugfix: Require unit_threaded only in the testfunctions themselves

Fixes #3

source/colored/package.d

@@ -26,7 +26,6 @@ version (unittest)
     import std.conv : to;
     import std.process : environment;
     import std.stdio : writeln, write;
-    import unit_threaded;
 }
 /// Available Colors
 enum AnsiColor
@@ -180,11 +179,13 @@ string onRgb(string s, ubyte r, ubyte g, ubyte b)
     return RGBString(s).onRgb(r, g, b).to!string;
 }
 
+/+
 @system @("rgb") unittest
 {
-    // import std.experimental.color : RGBA8, convertColor;
-    //   import std.experimental.color.hsx : HSV;
-/*
+    import unit_threaded;
+    import std.experimental.color : RGBA8, convertColor;
+    import std.experimental.color.hsx : HSV;
+
     writeln("red: ", "r".rgb(255, 0, 0).onRgb(0, 255, 0));
     writeln("green: ", "g".rgb(0, 255, 0).onRgb(0, 0, 255));
     writeln("blue: ", "b".rgb(0, 0, 255).onRgb(255, 0, 0));
@@ -197,8 +198,8 @@ string onRgb(string s, ubyte r, ubyte g, ubyte b)
         }
         writeln;
     }
-*/
-/*
+
+
     int delay = environment.get("DELAY", "0").to!int;
     for (int j = 0; j < 255; j += 1)
     {
@@ -211,12 +212,14 @@ string onRgb(string s, ubyte r, ubyte g, ubyte b)
         Thread.sleep(delay.msecs);
         write("\r");
     }
-*/
+
     writeln;
 }
++/
 
 @system @("styledstring") unittest
 {
+    import unit_threaded;
     foreach (immutable color; [EnumMembers!AnsiColor])
     {
         auto colorName = "%s".format(color);
@@ -239,6 +242,7 @@ string onRgb(string s, ubyte r, ubyte g, ubyte b)
 
 @system @("styledstring ~") unittest
 {
+    import unit_threaded;
     ("test".red ~ "blub").should == "\033[31mtest\033[0mblub";
 }
 
@@ -281,6 +285,7 @@ mixin(styleMixin!Style);
 
 @system @("api") unittest
 {
+    import unit_threaded;
     "redOnGreen".red.onGreen.writeln;
     "redOnYellowBoldUnderlined".red.onYellow.bold.underlined.writeln;
     "bold".bold.writeln;
@@ -414,6 +419,7 @@ auto tokenize(Range)(Range parts)
 
 @system @("ansi tokenizer") unittest
 {
+    import unit_threaded;
     [38, 5, 2, 38, 2, 1, 2, 3, 36, 1, 2, 3, 4].tokenize.should == ([
         [38, 5, 2], [38, 2, 1, 2, 3], [36], [1], [2], [3], [4]
     ]);
@@ -520,6 +526,7 @@ auto rightJustifyFormattedString(string s, ulong width, char fillChar = ' ')
 
 @system @("rightJustifyFormattedString") unittest
 {
+    import unit_threaded;
     "test".red.to!string.rightJustifyFormattedString(10).should == ("      \033[31mtest\033[0m");
 }
 
@@ -530,6 +537,7 @@ auto forceStyle(string text, Style style) {
 
 @("forceStyle") unittest
 {
+    import unit_threaded;
     auto splitt = "1es2eses3".split("es").filter!(not!(empty));
     splitt.should == ["1", "2", "3"];
     string s = "noformatting%snoformatting".format("red".red).forceStyle(Style.reverse);