Drop fees by 10x due to the persistently higher exchange rate.

The last fee drop was by 5x (from 50k satoshis to 10k satoshis)
in the 0.8.2 release which was about 6 months ago.

The current fee is (assuming a $500 exchange rate) about 5 dollar
cents. The new fee after this patch is 0.5 cents.

Miners who prefer the higher fees are obviously still able to
use the command line flags to override this setting. Miners who
choose to create smaller blocks will select the highest-fee paying
transactions anyway.

This would hopefully be the last manual adjustment ever required
before floating fees become normal.
Adds additional zero checks for setCompact
 These encoded values should all decode to zero

   Positive Numbers
    0x01003456 (1 byte  0x00)
    0x02000056 (2 bytes 0x0000)
    0x03000000 (3 bytes 0x000000)
    0x04000000 (4 bytes 0x000000_00)

   Negative Numbers
    0x00923456 -(0 bytes, so zero)
    0x01803456 -(1 byte  0x00)
    0x02800056 -(2 bytes 0x0000)
    0x03800000 -(3 bytes 0x000000)
    0x04800000 -(4 bytes 0x000000_00)
Don't store or send side-chain blocks lower than last checkpoint.
[Qt] Improve single step in bitcoinamountfield
Per-peer block download tracking and stalled download detection.

Keep track of which block is being requested (and to be requested) from
each peer, and limit the number of blocks in-flight per peer. In addition,
detect stalled downloads, and disconnect if they persist for too long.

This means blocks are never requested twice, and should eliminate duplicate
downloads during synchronization.
Log warnings when bootstrap files are specified but cannot be opened

- Log a warning when bootstrap files are specified using `-loadblock`
but cannot be opened.
- Log a warning when bootstrap.dat exists in the home directory
but cannot be opened.
Copyright header updates s/2013/2014 on files whose last git commit was done in 2014.
contrib/devtools/fix-copyright-headers.py script to be able to perform this maintenance task with ease during the rest of the year, every year. Modifications to contrib/devtools/README.md to document what fix-copyright-headers.py does.
linearize.py: Harmonize rpcpass to rpcpassword

linearize.py: harmonize rpcpass to rpcpassword according settings in
bitcoin.conf
fix non-standard reason string in main.cpp
Track and report wallet transaction clones

Adds a "walletconflicts" array to transaction info; if
a wallet transaction is mutated, the alternate transaction id
or ids are reported there (usually the array will be empty).

Metadata from the original transaction is copied to the mutant,
so the transaction time and "from" account of the mutant are
reported correctly.
Merge pull request #3671 from gavinandresen/txn_conflicts

Report transaction conflicts, and tentative account balance fix
[Qt] allow translation of client bitness
qt: Add option to (not) spend unconfirmed change

- Add a wallet tab to options dialog
- Move fee setting to wallet tab
- Add new setting to set -nospendzeroconfchange from UI
Merge pull request #3676

29d4507 qt: Add option to (not) spend unconfirmed change (Wladimir J. van der Laan)
Document new `walletpassphrase` behavior in 0.9

Also add a note to the release notes.
Fixes #3672.
Merge pull request #3646

5770254 Copyright header updates s/2013/2014 on files whose last git commit was done in 2014. contrib/devtools/fix-copyright-headers.py script to be able to perform this maintenance task with ease during the rest of the year, every year. Modifications to contrib/devtools/README.md to document what fix-copyright-headers.py does. (gubatron)
remove orphan fHaveGUI from main.h
Serialize only CTransaction data in gettransaction RPC hex

Don't include trailing implementation-specific wallet metadata.
Fixes 3a1c20b.
Merge pull request #3688

7f1b6a6 remove orphan fHaveGUI from main.h (Philip Kaufmann)
Merge pull request #3649

3078b58 linearize.py: Harmonize rpcpass to rpcpassword (Subo1978)