Installs p4merge on a linux based machine

p4merge install

# p4merge for 64 bit
```
wget http://www.perforce.com/downloads/perforce/r17.3/bin.linux26x86_64/p4v.tgz
```

# p4merge for 32 bit
```
wget http://www.perforce.com/downloads/perforce/r17.3/bin.linux26x86/p4v.tgz
```

# Instructions to install
```
tar zxvf p4v.tgz
sudo cp -r p4v-* /usr/local/p4v/
sudo ln -s /usr/local/p4v/bin/p4merge /usr/local/bin/p4merge
```