Standardize editor configs for cross-platform development (#628)

.editorconfig

@@ -0,0 +1,16 @@
+# http://editorconfig.org
+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 2
+max_line_length = 80
+trim_trailing_whitespace = true
+
+[*.md]
+insert_final_newline = false
+trim_trailing_whitespace = false

.gitattributes

@@ -0,0 +1,3 @@
+# Auto detect text files and perform LF normalization
+* text=auto
+* text eol=lf