.gitignore Gemfile.lock per previous commit

Gemfile.lock was removed in a previous commit, should be ignored so it doesn't get committed again.

https://github.com/imathis/octopress/commit/06c04397053e46fe02fcecce589a2de76d21e160
Merge pull request #1617 from nickhammond/patch-1

.gitignore Gemfile.lock per previous commit
Delete Gemfile.lock

Follow-up to #1617
remove deprecated gems 'jekyll-page-hooks' and 'jekyll-date-format'
Merge pull request #1622 from raysrashmi/ry-updating-gems

remove deprecated gems 'jekyll-page-hooks' and 'jekyll-date-format'
Revert "remove deprecated gems 'jekyll-page-hooks' and 'jekyll-date-format'"

This reverts commit 181d620c1c46c644c4319e81edc342ae5a30c067.
Support octopress-hooks and octopress-date-format #1622
Use `octopress-hooks` and `octopress-date-format`

Not applied in 73e540409ceb8bc18048b6a96a4b815fc303ea28.

Fix #1622.
Merge pull request #1628 from yous/patch-octopress-filter

Use `octopress-hooks` and `octopress-date-format`
Set layout to null to avoid page defaults.
Merge remote-tracking branch 'upstream/master' into source

Conflicts:
	Gemfile.lock
Squashed '.themes/whitespace/' changes from afd83da..7b2e05b

7b2e05b grammar...
40ae926 more style and grammar
d9c27bd grammar
b041be0 now supporting high-quality typeset math via mathjax
f673255 Merge pull request #47 from alwynlombaard/add-googleplus-rel-author-to-author-link
2249410 Merge branch 'master' of https://github.com/lucaslew/whitespace
d7afa7b new website demos
7a90d91 Merge pull request #48 from atimothee/master
46cd263 update readme, added rake install command for zshell
01ca6eb Revert condition check to empty string check
2adadc3 Update readme
87609e4 Changes taking into account  comments by @yous
b983d12 Override g+ author link with post googleplus_user with option to ignore
43c7e41 Replaced tabs with 2 spaces
4abc970 Add g+ link with rel='author' to authored by text

git-subtree-dir: .themes/whitespace
git-subtree-split: 7b2e05ba837f64695b5a7b9dbf088a48ff7d4d66
Merge commit 'cb2a6c760808b13198007bccfc0a284efc9c19b2' into source
Apply whitespace theme

7b2e05ba837f64695b5a7b9dbf088a48ff7d4d66
Hide emails from code block