Update readme for v0.1.5

Readme.Rmd

 - Add "flavors" menu to **Regex** tab. Automatically sets options to common flavors.
   Mainly for clarity when switching between "base"" style and "tidyverse/stringr" defaults.
   
-- Add replacement functions somewhere. Maybe to **Output** tab with `g?sub` and 
+- **Done in v0.1.5!** Add replacement functions somewhere. Maybe to **Output** tab with `g?sub` and 
   `str_replace(_all)?` as options with an additional "replacement" field that 
   appears when those are selected. Or possibly as a "flavor" (see above) in the
   **Regex** tab.
 
 - I may add `stringi` functions to the list of available functions in the **Output** tab.
 
-- I would like to add the regex/function options for the functions in the **Output** tab, i
+- **Done in v0.1.5!** I would like to add the regex/function options for the functions in the **Output** tab, i
   similar to the options present in the **Regex** tab.

Readme.md

     common flavors. Mainly for clarity when switching between “base”"
     style and “tidyverse/stringr” defaults.
 
-  - Add replacement functions somewhere. Maybe to **Output** tab with
-    `g?sub` and `str_replace(_all)?` as options with an additional
-    “replacement” field that appears when those are selected. Or
-    possibly as a “flavor” (see above) in the **Regex** tab.
+  - **Done in v0.1.5\!** Add replacement functions somewhere. Maybe to
+    **Output** tab with `g?sub` and `str_replace(_all)?` as options with
+    an additional “replacement” field that appears when those are
+    selected. Or possibly as a “flavor” (see above) in the **Regex**
+    tab.
 
   - I may add `stringi` functions to the list of available functions in
     the **Output** tab.
 
-  - I would like to add the regex/function options for the functions in
-    the **Output** tab, i similar to the options present in the
-    **Regex** tab.
+  - **Done in v0.1.5\!** I would like to add the regex/function options
+    for the functions in the **Output** tab, i similar to the options
+    present in the **Regex** tab.