Creating simple_order_cycle instead of order_cycle

Speedup on my machine:
 1 minute 44.52 seconds
 21.9 seconds
Using simple_order_cycle

order_cycle: 1 minute 56.88 seconds
simple_order_cycle: 1 minute 8.05 seconds
Using simple_order_cycle

Test timings were not accurate. Output:
4 order_cycles: 9.94 seconds
2 order_cycles: 9.87 seconds
0 order_cycles: 9.9 seconds

Felt execution was much higher
Using simple_order_cycle where applicable

Before: 3 minutes 0 seconds
After:  1 minute 21.02 seconds
Using simple_order_cycle

Before: 2 minutes 8.7 seconds
After:  16.11 seconds
Using simple_order_cycle

Before: 2 minutes 58.3 seconds
After:  35.04 seconds
Using simple_order_cycle in spec

Before: 4 minutes 6.9 seconds
After:  3 minutes 27.4 seconds
Using simple_order_cycle in clone spec

Creating a coordinator fee and two exchanges in the spec instead of
using a full order_cycle. Timing of this single test:

Before: 15.32 seconds
After:   6.26 seconds
Add rails-i18n gem.
Localize more strings on home page.
Name based on meaning instead of context
Merge branch 'master' into using-simple-order-cycle
Merge branch 'using-simple-order-cycle'