Modularizarion by npm and all-in-one bundle by browserify

[twada]

Split and modularize power-assert-formatter.js internals

• Build all-in-one bundle by browserify
• Migrate to gulp
• Modularize
• Extract type-name module
• Dealing with east asian width
• Surrogate pair?
• Separate context traversal from renderling
• Splitting various renderers

[coveralls]

Coverage remained the same when pulling c84d9b4 on browserify into 66a59d0 on master.

[coveralls]

Coverage remained the same when pulling bfa4b06 on browserify into 66a59d0 on master.

[coveralls]

Coverage increased (+1.3%) when pulling 6524d9c on browserify into 66a59d0 on master.

[coveralls]

Coverage increased (+1.6%) when pulling 0b335df on browserify into 66a59d0 on master.

[coveralls]

Coverage increased (+0.71%) when pulling b53ba86 on browserify into 66a59d0 on master.

[coveralls]

Coverage increased (+0.76%) when pulling 3d19b58 on browserify into 66a59d0 on master.

[coveralls]

Coverage increased (+0.76%) when pulling 4e4632c on browserify into 66a59d0 on master.

[coveralls]

Coverage increased (+0.9%) when pulling 3fa335a on browserify into 66a59d0 on master.

[coveralls]

Coverage increased (+0.9%) when pulling 2b5c6f8 on browserify into 66a59d0 on master.

[coveralls]

Coverage increased (+1.01%) when pulling cffc26f on browserify into 66a59d0 on master.

[coveralls]

Coverage increased (+1.01%) when pulling f1d8b8a on browserify into 66a59d0 on master.

[coveralls]

Coverage increased (+1.29%) when pulling 81859d0 on browserify into 66a59d0 on master.

[coveralls]

Coverage increased (+1.29%) when pulling 0e07df1 on browserify into 66a59d0 on master.