Create README.md

Author: ankithads

README.md

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+# String-replacer
+
+This project replaces the placeholders ${namespace:key} in the parsed string with the value obtained from the variables file
+"<namespace>.properties" that matches the key of the placeholder.
+
+Reads the commands from STDIN and writes results to STDOUT. Reporting of error conditions is done via STDERR. 
+
+INPUT:
+<keyword> [parameters] 
+
+Keyword: language/replace/quit
+
+The command for changing language is: language [country_code] 
+Note: The folder(en/fr) which contains the variable files should be in the same path as source files.
+
+Replacements are submitted to the program using the replace command: replace "[String to process]" [preserveUnmatched=false] 
+
+Exit the program : quit