[O] Some documentation suggestions

[TonyMc]

Dear Bastien et al,

I have been reading through the Org manual (version 8.2.1) and have
found a few errors of grammar or places where the English doesn't
sound right.  I list them below with some suggested replacements
(separated by ->).  I hope this is helpful.

Best,
Tony

* 1.4 Feedback
"If you re" -> "If you are"

* 2.5 Structure Editing
"level than" -> "level as" (twice)

* 2.6 Sparse Trees
"several commands creating" -> "several commands for creating"

* 2.7 Plain Lists
"theirs sub-items" -> "their sub-items"

3.1 Table editor
"region to table" -> "region to a table"

3.5.1 References
"one but last" -> "last but one"

3.5.4 Durations and time values
"[HH:MM[:SS]" -> "HH:MM[:SS]"

3.5.5 Field and range formulas
"column and rows" -> "columns and rows"
"To avoid this from happening" -> "To prevent this from happening" or
"To avoid this"

3.5.6 Column formulas
"can not" -> "cannot"

4.2 Internal links
"put the line" -> "put in the line"

4.6 Link abbreviations
"text don't" -> "text doesn't"

5.2.3 Multiple keyword sets
"S-<<right>>" -> "S-<right>"

5.3.2 Tracking TODO state changes
"you not only" -> "You not only"

7.1 Property syntax
"activate this changes." -> "activate this change."

7.5.2 Using column view
"modified values is" -> "modified value is"

8 Dates and times
"used as indicating" -> "used to indicate"

8.1 Timestamps, deadlines and scheduling
""That order depend" -> "That order depends"

8.3 Deadlines and scheduling
"a specific deadlines" -> "a specific deadline"
"task get scheduled" -> "task gets scheduled"

8.4 Clocking work time
"to that you can" -> "so that you can"

8.4.1 Clocking commands
"in inserts it" -> "and inserts it"

8.4.2 The Clock table
"and specify" -> "specifies"
"either absolute" -> "either absolutely"
"There options" -> "These options"

10.3.3 Matching tags and properties
"one of the tag" -> "one of the tags"
"Except the Special properties" -> "In addition to the Special
properties"

10.4.4 Filtering/limiting agenda items
"_fitlers_" -> "_filters_"
"Filter are" -> "Filters are"
"catogories" -> "categories"
"that as no effort" -> "that has no effort"

10.6.3 Setting options for custom commands
"an agenda commands" -> "an agenda command"

11 Markup for rich export
"like HTML, LaTeX" -> "like HTML and LaTeX"

Document title
"associated to buffer" -> "associated with the buffer"

11.8 Special blocks
"at a specific back-ends" -> "at a specific back-end"

12.11 Other built-in back-ends
"these export back-end" -> "these export back-ends"

15.3 Speed keys
"Speed keys do not only" -> "Speed keys not only"

15.4 Code evaluation and security issues
" work with the code snippets" -> "work with code snippets"

15.6 Summary of in-buffer settings
"any of those lines" -> "any of these lines"

Appendix A Hacking
"some aspects" -> "some areas"

A.4 Adding export back-ends
"or from deriving them" -> "or by deriving them"

A.8 Special agenda views
"the same than `agenda'" -> "the same as `agenda'"

A.9 Speeding up your agendas
"slowliness caused by accessing to" -> "slowdown caused by accessing"

Appendix B MobileOrg
"It does also allow" -> "It also allows"

B.1 Setting up the staging area
"consider to encrypt" -> "consider encrypting"

B.2 Pushing to MobileOrg
"same name than their" -> "same name as their"