Thane Thomson 70592cc4d8 libs/common: remove deprecated PanicXXX functions (#3595)
* Remove deprecated PanicXXX functions from codebase

As per discussion over
[here](https://github.com/tendermint/tendermint/pull/3456#discussion_r278423492),
we need to remove these `PanicXXX` functions and eliminate our
dependence on them. In this PR, each and every `PanicXXX` function call
is replaced with a simple `panic` call.

* add a changelog entry
2019-04-26 14:23:43 +04:00
..
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