Minor changes

Added project specifications and one more test case
Updated README.md

Author: DomenicoCacace

.gitattributes

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+TestCases/* linguist-generated
+docs/* linguist-documentation

README.md

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-ProgettoAPI2019
+# Overview
+This repository contains a naïve C implementation of a Relational DBMS, as required by the [project specifications](docs/ProvaFinale2019.pdf).  
+The project is evaluated in terms of correctness (output results) and efficiency (response time and occupied memory) on [public](TestCases/) and private test cases; for this particular implementation, the final score is 29/30.
+
+# Project Description
+The project goal is to implement a mechanism to monitor relationships between entities, which may change over time. The mechanism has to monitor the following events:  
+- A new entity begins to be monitored  
+- A monitored entity stops to be monitored    
+- A new relationship is established between two monitored entities  
+- An existing relationship between two monitored entities ceases to exist  
+
+The relations might not be symmetrical.  
+
+When the system receives a specific command, the application returns, for each relationship, the entity "receiving" more relationships.
+
+## Commands
+
+The application receives commands from an input file. The possible commands are the following:
+
+- <b>addent<id_ent></b>: adds an entity identified by <i>id_ent</i> to the monitored entities;
+- <b>delent<id_ent></b>: removes the entity identified by <i>id_ent</i> from the monitored entities
+- <b>addrel<id_orig><id_dest><id_rel></b>: adds a relationship, identified by <i>id_rel</i>, from the entity <i>id_orig</i> to the entity<i>id_dest</i>
+- <b>delrel<id_orig><id_dest><id_rel></b>: removes a relationship, identified by <i>id_rel</i>, from the entity <i>id_orig</i> to the entity<i>id_dest</i>
+- <b>report</b>: prints, for each relationship, the entities having the most entering relationships
+- <b>end</b> signals the end of the input file
+
+
+More information about the commands and the parameters syntax can be found [here](docs/ProvaFinale2019.pdf)
+
+