Get cpu count when $top is used.

Fixes ${top cpu} when top_cpu_seperate is used in some cases.
info.cpu_count is filled lazily when objects that need it are used, but
this was not the case for $top.
Use dcompare when comparing doubles.

Truncated longs are not desired as ${if_match 0.1 > 0.0} would skip the
block.
Merge pull request #15 from Tucos/1.9.1

Small fixes