update readmes with formatting consistency

Author: mckennapsean

C/README.md

@@ -45,12 +45,12 @@ Program List
 Compiling & Running Code
 ------------------------
 
-For Linux, you can use the provided bash script
+For Linux, you can use the provided bash script:
 >  e.g. for program: **caesarCipher.c**
 
 > >  ./run **caesarCipher**
 
 Credit
 ------
 
-**Leon Tabak** for inspiring *binarySearchTree.c*, *stack.c*, & *macros.c*
+**Leon Tabak** for inspiring *binarySearchTree.c*, *stack.c*, & *macros.c*.

D3/README.md

@@ -39,11 +39,11 @@ Program List
 Compiling & Running Code
 ------------------------
 
-simply open the HTML files in a web browser
+Open the HTML files in a web browser.
 
-loading files in D3 will require running a web server
+Loading files in D3 (e.g. data) will require running a web server in some browsers.
 
 Credit
 ------
 
-the cheat sheet and tutorials provided from the *Introduction to Data Visualization on the Web with D3.js* workshop at IEEE VIS 2012 by **Jerome Cukier**, **Jeff Heer**, & **Scott Murray** and updated to d3v4 by **Sean McKenna**
+The cheat sheet and tutorials provided from the *Introduction to Data Visualization on the Web with D3.js* workshop at IEEE VIS 2012 by **Jerome Cukier**, **Jeff Heer**, & **Scott Murray** and updated to d3v4 by **Sean McKenna**.