Check only if sum exceed 12
Updating tests based on the new behavior
Gifsicle: Updated to v 1.83 (Windows).
Merge pull request #955 from GProulx/ErrorOnlyWhenOver12Columns

Bootstrap: Error only when over 12 columns
Merge pull request #957 from am11/master

Gifsicle: Updated to v 1.83 (Windows)
CssSourceMap: Better use of Linq.
Code: Refactored bundles file watcher.
Code: Suppresses CA1812; class's for JSON decode.
Merge pull request #958 from am11/master

CssSourceMap: Better use of Linq
Nightly v2.0.8
Bundle: Segregates read lock.
Bundle: Minor improvements.
* Adds settings interface for bundles.
* Renames variable for generalization.
Markdown: Don't generate HTML on save. (#951)
Merge pull request #959 from am11/master

Bundle: Segregates read lock
Merge pull request #960 from am11/issue-951-markdown

Markdown: Don't generate HTML on save (#951)
CssSourceMap: Null checks and minor improvements.
CSS: Extract to file with import directive. (#964)
* Works for both LESS & SCSS.
Merge pull request #965 from am11/master

Extract to file with import directive (#964)
Code: Reuses a variable.
Merge pull request #966 from am11/master

Code: Reuses a variable