Fix/doc bugs

[collinc97]

Fixes bugs found when writing documentation.

• The Leo CLI should print to console on successful compilation of a lib.leo file.
• eq and ne should have the same operator precedence as other relational comparators
• The protected names should be updated to exclude all current leo keywords such as address

[codecov]

Codecov Report

Merging #110 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #110   +/-   ##
=======================================
  Coverage   68.36%   68.36%           
=======================================
  Files         255      255           
  Lines        6881     6882    +1     
=======================================
+ Hits         4704     4705    +1     
  Misses       2177     2177           

Impacted Files	Coverage Δ
ast/src/ast.rs	93.75% <100.00%> (+0.06%)	⬆️

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