rework help messages for fee-related options

- mention the units and show the default for -paytxfee
change "char pch[200000]" to "new char[200000]"
[Qt] don't allow translation of our example btc address
Issue warning if collecting RandSeed data failed
Relax IsStandard rules for pay-to-script-hash transactions

Relax the AreInputsStandard() tests for P2SH transactions --
allow any Script in a P2SH transaction to be relayed/mined,
as long as it has 15 or fewer signature operations.

Rationale: https://gist.github.com/gavinandresen/88be40c141bc67acb247

I don't have an easy way to test this, but the code changes are
straightforward and I've updated the AreInputsStandard unit tests.
Refactor proof of work related functions out of main
move pow constants to chainparams
replace 3 separate calls to WSAGetLastError() with 1
Add dependencies for Mac OSX gitian builds
Consistent lettering
Update .gitignore

Removing old file ignores so they show up in `git status`
Merge pull request #4408

e3aedba Consistent lettering (Whit J)
Merge pull request #4406

b79f59b Update .gitignore (Drak)
Merge pull request #4404

e9f2460 Add dependencies for Mac OSX gitian builds (Drak)
Merge pull request #4390

6dc90ed replace 3 separate calls to WSAGetLastError() with 1 (Philip Kaufmann)
Merge pull request #3839

fd704c7 move pow constants to chainparams (jtimon)
df852d2 Refactor proof of work related functions out of main (jtimon)
Move network-time related functions to timedata.cpp/h

The network time-offset-mangement functions from util.cpp are moved to
timedata.(cpp|h). This breaks the dependency of util on netbase.
Remove unnecessary dependencies for bitcoin-cli

This commit removes all the unnecessary dependencies (key, core,
netbase, sync, ...) from bitcoin-cli.

To do this it shards the chain parameters into BaseParams, which
contains just the RPC port and data directory (as used by utils and
bitcoin-cli) and Params, with the rest.
Move coins.cpp and keystore.cpp to libbitcoin_common

Prepare for introduction of `bitcoin-tx` tool.
Merge pull request #4368

75c82d4 Move coins.cpp and keystore.cpp to libbitcoin_common (Wladimir J. van der Laan)
84ce18c Remove unnecessary dependencies for bitcoin-cli (Wladimir J. van der Laan)
14f888c Move network-time related functions to timedata.cpp/h (Wladimir J. van der Laan)