Merge pull request #124 from Conky5/master

Add support for possible javascript popups
fixed broken specs from pull request
can now find text_field with :css when using Selenium
fixed error getting SelectList nested in frame using Selenium
Added selected_values to SelectList
version bump for new release
Add CSS selector to select_list.
Add css support for div element.
Removing unnecessary debug break-point
Setup environment in .rvmrc inspired by https://github.com/YouthTree/TEDxPerth/blob/master/.rvmrc
Add support to visit_page and on_page for pageobject strings
Updated RDoc and added support to if_page for string parameter
Return nil when there is no corresponding table cell.

When indexing a table by column for a table cell, currently TableRow
will return a TableCell object even if there is not a cell which
corresponds to the referenced column.  This commit will cause the
TableRow#[] method to return nil if a cell doesn't exist for the
referenced column.
Merge pull request #131 from justinrolston/patch-1

Removing unnecessary debug break-point
Merge pull request #133 from fohara/master

Return nil when there is no corresponding table cell for a referenced column.
Merge pull request #130 from MassRelevance/select-list-css

Add CSS selector to select_list
Merge pull request #132 from peterhartman/visit_page_string

Visit page string
added changelog entries for pull requests and reverted rvmrc to not run bundle install
added params hash as new page class variable
can now insert ERB into page_url string and access params