Fix typos

Patch by Paul Menzel.

README.md

@@ -4,8 +4,8 @@ The Punk Nova font
 This is an OpenType implementation of Donald Knuth's
 [Punk font](http://tug.org/TUGboat/Articles/tb09-2/tb21knut.pdf).
 
-The Original Metafont sources were adapted to a more Metapost friendly
-form by Taco Hoekwater et. al.
+The original Metafont sources were adapted to a more MetaPost friendly
+form by Taco Hoekwater et al.
 
 Punk is a dynamic font, every time a glyph is requested Matafont draws
 a unique instance of it. On the other hand, OpenType is static, glyph
@@ -17,13 +17,13 @@ Alternate shapes are mapped to the base character using OpenType
 feature (rand), which tells the renderer to select glyphs randomly from
 the list of alternate shapes.
 
-The PostScript outlines of the glyphs are generated by Matapost, a
-Python script then used FontForge to import the glyphs into an OpenType
+The PostScript outlines of the glyphs are generated by MetaPost, a
+Python script then uses FontForge to import the glyphs into an OpenType
 CFF font. Since this year is the 2^5 anniversary of TeX, each lower case
 letter have 2^5 variants, 2^4 for each upper case and 2^3 for the rest.
 
 This font is free software, you can do whatever you want with it as long
-as you use different font and file name. The exact copyright statement is:
+as you use different font and file names. The exact copyright statement is:
 
      "Unlimited copying and redistribution of this file are permitted as long
       as this file is not modified. Modifications are permitted, but only if
@@ -38,7 +38,7 @@ The MetaPost source has the following notice:
       Font inspired by Gerard and Marjan Unger's lectures,
       Feb 1985
 
-    The regular punk files are part of TeXLive and in metafont format. All
+    The regular punk files are part of TeXLive and in Metafont format. All
     errors introduced are ours. We also changed the encoding to unicode. In
     due time we might add a few more more characters. We still need to
     improve some of the metrics which involves a bit of trial and error. The