Streamline docs for 1.1.0 release

[greghaskins]

The main goal of this PR is further organizing the docs in preparation for the next release.

• [ ] Simplify the main README as much as possible, referring to the docs instead for more detail
• [ ] Punch up the docs so they stand alone as a usable guide to the library (without needing to refer to many other sources).

[codecov[bot]]

Codecov Report

Merging #106 into master will not change coverage. The diff coverage is 100%.

@@           Coverage Diff            @@
##             master    #106   +/-   ##
========================================
  Coverage      99.4%   99.4%           
  Complexity      312     312           
========================================
  Files            39      39           
  Lines           669     669           
  Branches         16      16           
========================================
  Hits            665     665           
  Partials          4       4

Impacted Files	Coverage Δ	Complexity Δ
...kins/spectrum/dsl/specification/Specification.java	100% <ø> (ø)	19 <0> (-1)	:arrow_down:
.../main/java/com/greghaskins/spectrum/Configure.java	100% <100%> (ø)	11 <1> (+1)	:arrow_up:

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