Improve integration instructions

Author: alandefreitas

README.md

@@ -2319,10 +2319,12 @@ This will build the examples in the `build/examples` directory:
 mkdir build
 cd build
 cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_FLAGS="-O2"
-cmake --build . -j 2 --config Release
+cmake --build . --parallel 2 --config Release
 ```
 
-On windows, replace `-O2` with `/O2`.
+* Replace `--parallel 2` with `--parallel <number of cores in your machine>`
+* On Windows, replace `-O2` with `/O2` 
+* On Linux, you might need `sudo` for this last command
 
 #### Installing Matplot++ from Source
 
@@ -2332,11 +2334,13 @@ This will install Matplot++ on your system:
 mkdir build
 cd build
 cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_FLAGS="-O2" -DBUILD_EXAMPLES=OFF -DBUILD_TESTS=OFF 
-cmake --build . -j 2 --config Release
+cmake --build . --parallel 2 --config Release
 cmake --install .
 ```
 
-On windows, replace `-O2` with `/O2`. You might need `sudo` for this last command.
+* Replace `--parallel 2` with `--parallel <number of cores in your machine>` 
+* On Windows, replace `-O2` with `/O2` 
+* On Linux, you might need `sudo` for this last command
 
 #### Building the packages
 
@@ -2346,14 +2350,14 @@ This will create the binary packages you can use to install Matplot++ on your sy
 mkdir build
 cd build
 cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_FLAGS="-O2" -DBUILD_EXAMPLES=OFF -DBUILD_TESTS=OFF
-cmake --build . -j 2 --config Release
+cmake --build . --parallel 2 --config Release
 cmake --install .
 cpack .
 ```
 
-On windows, replace `-O2` with `/O2`. You might need `sudo` for this last command.
-
-
+* Replace `--parallel 2` with `--parallel <number of cores in your machine>`
+* On Windows, replace `-O2` with `/O2` 
+* On Linux, you might need `sudo` for this last command
 
 ### CMake targets