Adds information on operator precedence

Adds a order of operations table and a note for Matlab users.
only show ccall literal address warning in imaging mode. closes #5215
Merge pull request #5202 from mbauman/doc-precedence

Doc: Add information on operator precedence
Merge branch 'master' of github.com:JuliaLang/julia
fix doc for && and || and update helpdb
annotate the types of arguments for derived trigonometric & hyperbolic functions
Merge pull request #5220 from lindahua/dh/trigono2

Annotate arguments for derived trigonometric & hyperbolic functions