Add FORMATTING.md
Change wording to be more subjective.
Fixed punctuation
Fixed typo, change "one time" for "once".
Replaced tabs by whitespaces (as stated in the FORMATTING guide)
Added a missing backtick
Changed `intva`l to `intval`
Rephrase to be more normative.
Fixed repo url
Update php-spec-draft.md
consistency in byRef assignments

some places `=&` is used, while other places `= &` is used.
Typos
Consistency in how to format types

There seems to be missing a specification on when to write e.g. bool and when to write `bool`.
The PR only contains two obvious corrections. 
There are more in there to consider.
Add missing `
Merge pull request #8

* pull-request/8:
  Fixed typo, change "one time" for "once".
  Fixed punctuation
Merge pull request #10

* pull-request/10:
  Replaced tabs by whitespaces (as stated in the FORMATTING guide)
Merge pull request #11

* pull-request/11:
  Added a missing backtick
Merge pull request #12

* pull-request/12:
  Changed `intva`l to `intval`
Merge pull request #14

* pull-request/14:
  Fixed repo url
Merge pull request #17

* pull-request/17:
  consistency in byRef assignments