Add accounting for Pivotal to VMware stock conversation

[ryanconley1]

Add ability for tracking tax basis for Pivotal shares that were converted to VMware shares post Pivotal acquisition. These VMware shares are now converted to Broadcom shares.

"Under the terms of the transaction, Pivotal’s Class A common stockholders are entitled to receive $15.00 per share cash for each share held (without interest and less applicable tax withholdings), and Pivotal’s Class B common stockholder, Dell Technologies, received approximately 7.2 million shares of VMware Class B common stock, at an exchange ratio of 0.0550 shares of VMware Class B common stock for each share of Pivotal Class B common stock."

Reference:
https://news.vmware.com/releases/vmware-completes-acquisition-of-pivotal