Fix build script, weird OSX issues, improve docs

Merge pull request #136 from timholy/teh/fix_osx

Fix test failures on OSX

Improve performance

See #127

Add includet

Plus additional robustness in the expression parsing

Support for call overloading expressions and improved stdlib support

Merge pull request #124 from timholy/teh/morefixes

Fixes for a few small problems

Internal revamp

This is a major new release:

• large-scale reorganization of Revise's internals and extension to more corners of valid Julia syntax
• adds a build-script to resolve the "max file watches" issue
• streamlines the recommended configuration of the startup file
• adds extensive documentation, including the first Documenter docs

Support deletion of methods with destructured arguments

This also improves display of internal types

Add Statistics stdlib recipe

Merge pull request #112 from timholy/teh/statistics

Add recipe for Statistics stdlib

OrderedCollections

• Avoid calling parse_expr! for non-Expr objects (#110)
• Switch away from DataStructures and use the more minimal OrderedCollections

Return info about revision success or failure

return status of module reevaluation (#106)

Also fixes formatting of errors

Git integration

Merge pull request #104 from timholy/teh/git

LibGit2 integration and tracking subdirs of Julia