Ensure parse_module! doesn't trigger eval unnecessarily

Merge pull request #209 from timholy/teh/fix_module_eval

Ensure parse_module! doesn't trigger eval unnecessarily

Better module hygiene

Merge pull request #200 from timholy/teh/fix_199

Fix sigex when module has a submodule named `Core` (fixes #199)

Change startup recommendations

Merge pull request #188 from timholy/teh/replinit

Change recommendations on startup.jl

Compare signatures using RelocatableExprs

Merge pull request #189 from timholy/teh/get_def_compiler

get_def works on methods in Core.Compiler

Faster startup, yet more arg-modifying macro fixes

Merge pull request #187 from timholy/teh/fix_183

 Fix module scoping in call to sig_type_exprs (fixes #183)

Better support for argument-modifying macros

Merge pull request #182 from timholy/teh/fix_181

Fix support for argument-modifying macros (fixes #181)

Delete before eval

Merge pull request #180 from timholy/teh/methdel_union

Swap the order of deletion and evaluation

Support argument-modifying macros

Merge pull request #177 from timholy/teh/fix_176

Support argument-modifying macros

Store unexpanded macros in defmap

Merge pull request #175 from timholy/teh/fix_174

Store unexpanded macros in defs (fixes #174)

Fix for empty kwargs

Merge pull request #172 from timholy/teh/ekwds

Handle calls with empty keyword args (fixes #171)