ReadMe Examples are incorrectly formatted

[maddisondavid]

In the ReadMe the command line examples are using < and > around test that are being interpreted as HTML tags and missing when the example is rendered. This makes the examples difficult to read, i.e.

For example: /run/pravega-benchmark/bin/pravega-benchmark -controller tcp://127.0.0.1:9090 -stream streamname1 -segments 1 -producers 1 -size 100 -throughput -1 -time 60

instead of

For Example:
<pravega benchmark directory>/run/pravega-benchmark/bin/pravega-benchmark  -controller tcp://127.0.0.1:9090  \
     -stream streamname1  -segments 1  -producers 1  -size 100   -throughput -1   -time 60

[RaulGracia]

Closed via #84.