IDL compiler renaming and formatting fixes (Perl)

This makes a number of cosmetic changes to the generated code.
No behavior or external changes -- just changes style of generated code.

1. renaming variables and functions
Attr/attr => Attribute/attribute
constData => constantConfiguration
attrData => attributeConfiguration
Batched* => *Configuration
batchConfigure*s => install*s
configure* => install*

(HTMLNames in core uses Attr, not Attribute, in a few places, so leaving as is, with comment.)

2. Regularizing spacing and blank lines
(Remove double blank lines, add single when needed, remove unnecessary space)

These issues were revealed and discussed in the Python rewrite,
and fixing them in Perl allows the Python CL to be cleaner
(rather than fixing in a followup).
https://codereview.chromium.org/23068032/

Review URL: https://chromiumcodereview.appspot.com/23361022

git-svn-id: svn://svn.chromium.org/blink/trunk@156623 bbb929c8-8fbe-4397-9dbb-9b2b20218538